Log Message:
Update go-text to 20151217. No changelog, other than the git commit
messages, is available:

cf49866 encoding/htmlindex: use UTF-8 encoding
ce34b78 display: remove completely
eab9e05 : run long tests after a generated package
0d87145 display: remove package
bfd069c : added .gitignore
4b7e67e encoding: added Replacement identifier and htmlindex tests
1848af7 encoding: encoders return errors on out-of-repertoire runes
f79ed80 : upgrade to CLDR 28 and necessary adjustments
92ca7bb encoding/charmap: don't map U+FFFD in encoder
ecbd6a8 : added bidi and htmlindex packages to gen.go
e1af416 encoding/htmlindex: updated tables
00e2053 unicode/bidi: moved bidi package to unicode
a749bae runes: added ReplaceIllFormed
dafab4a internal/format: fixed test for 32-bit architectures
c27e06c encoding: introduce Decoder/Encoder types and error handling
27af644 encoding/charmap: fix some Windows types
a0f6068 encoding/unicode: add WhatWG-compliant UTF8 Decoder
87ad79f bidi: fixed build breakage due to crossing changes
a72c392 bidi: api proposal
458f474 bidi: port of reference implementation
435f36e runes: fix test breakage
dd164d3 internal/triegen: handle \xc0 and \xc1 correctly
51beaed language/display: fix import
95315fc internal/format: added parser for CLDR number patterns
edeeb43 unicode/cldr: moved cldr to the unicode directory
9efec26 width: fix table
b8e57db language/display: moved display package
698d493 internal/ucd: added Parse function
7da657a bidi: rename BiDi class constants to short Unicode names.
ed3f1de internal/ucd: allow non-runes in expansion mode
e684700 message: add Catalog and formatted printing support
bfdb694 internal: small optimization on UniqueTags.
bd27c4a bidi: generate bidi trie and tests
54db231 internal/gen: add Repackage
954b8ae internal: add SortTags and UniqueTags
3fe38e9 currency: improve API
4838fa4 currency: equate undefined currency (XXX) to zero value
da608de language: remove "may change" notice
216b73f encoding/runes: fixed unittest breakage
4b139bd language: remove Currency type.
419b439 language: deprecate ComprehensibleTo and Version
d15837c language: reorder parsing code for clarity
44d5762 language: remove dependency on regexp
5eb8d46 language: deprecate Tag.ComprehensibleTo
615a6c1 language: new encoding for CompactIndex table
75c37a9 all: specify vanity import paths
a38fc26 internal/gen: make long string consts vars
b8643b2 language: add all languages with data in compact set
d91e619 language: pass user options in matched tag
cc8a7ec x/text/encoding/charmap: add more OEM codepages
22af857 language: improved example for parsing regions
0fe7e68 language: fixed test breakage
f024ad8 currency: fixed bug related to rounding info
7f6d024 currency: added symbol support
5722c1c message: first checkin
601048a currency: add currency lookup for regions and tags
3ce2b88 language: user -u-va-posix instead of -x-posix.
8f6601e : Added depdendencies to top-level generator.
7d45f34 internal: added Parents table.
202ed04 language: bug fix in compact index number
cb9d3ff language: added CompactIndex
b4ffa8e language: support en_US_POSIX
f8e557f internal/gen: add WriteGo variants of WriteGoFile equivalents
0820da9 cldr:  comment out check to work around CLDR bug
6368131 currency: refactored currency-related code.
505f8b4 internal/tag: factored out tag.Index
0483357 gen: factored out generic slice generation.
57878ed gen: factored out some code generation code
723492b language: allow lang-region as variant prefix
ff0822f internal: added NewInheritanceMatcher
07890ba cases: changed tests to be more version-aware
1309a18 cases: fix bug that caused character to drop in uppercase
083de50 cases: skip tests if unicode.Version does not match UnicodeVersion
43df643 display: fixed bug for unsupported tags
1af9528 language: fix bug where canonicalization is not idempotent
e265e5b display: change Skipf to Errorf
3eb7007 collate/colltab: improve resilience to Unicode version changes.
8553a64 : added search and added missing dependency.
06f6f7a cases: improve resilience to Unicode version changes.
a928dbc internal/gen: removed TODO
7c0e16d internal/gen: added Write*Version
50041c1 unicode/rangetable: Add key name when initializng Range16 and Range32.
2acc130 unicode/rangetable: added assigned tables
10e37ec text/encoding/japanese: iso-2022-jp encoder doesn't write KANJI-OUT.
7d081aa text: Upgrade to Unicode 8.0.0
be1f650 unicode/rangetable: updated comment
96ae61a language: added Currencies to the Coverage type.
1609407 unicode/rangetable: added New and Visit
d4cc1b1 cases: prepare for Unicode 8.0.0
d611288 display: skip link test if go binary not found
0600016 encoding/unicode: workaround for bug in go 1.4.*.
b93a7ba unicode/norm: fix bug that causes panic.
fbf6178 search: allow non-normalized strings
df923bb encoding/htmlindex: Fix generated code not being gofmted.
997478e encoding/htmlindex: implementation of htmlindex
5c66c9f collate: move iter from collate to internal/colltab
043fdd1 collate/colltab: fix a comment typo.
f81fc0e search: added first implementation of search
c93e7c9 collate/tools/colcmp: fix build breakage for darwin.
6c3b324 collate: fix test breakage
cee5b80 text: upgrade to CLDR 27.0.1
af4c2d7 search: added language matcher for collation and search.
583b6ac search: generate search tables.
f7bc91e runes: Added Transformer wrapper.
8d2a9d0 encoding/unicode: new BOM policy for standard UTF-16.
c3788f3 runes: new runes package.
fe79704 internal/colltab: some cleanup suggested earlier by Nigel.
4a2c389 text/internal/colltab: copy contract*.go files
88b9f7e encoding/ianaindex|htmlindex: API proposal for indexes.
d48eb58 text/encoding/charmap: a few bug fixes in global vars
a9f4d1a text/search: api proposal
2076e9c text/encoding: add MIB types to encodings.
7be3218 text/encoding/unicode: added BOMOverride.
5f74128 text/encoding/unicode: added tests and fixed bugs.
000f793 text/encoding/internal/identifier:
017c405 text/language: strip unneeded struct type qualifiers.
c6e0c33 text/internal/testtext: added code size measurer.
b6e95e7 text: added repository-wide generate tool.
c6bc7e8 text: add codereview.cfg
26df76b text/internal/gen: generalized Open (needed for w3c data).
313fa8d text/width: added examples/ godoc improvements.
cc9d297 text/width: added ASCII fast path for Narrow.
83ae7f6 text/width: added support for narrow and wide mappings.
f54a587 text/width: added inverse mapping