Log Message:
Update libchewing to 0.4.0.

What's New in libchewing 0.4.0 (Apr 11, 2014)
---------------------------------------------------------
* Add the following APIs:
  - Userphrase manipulation
    - chewing_userphrase_enumerate
    - chewing_userphrase_has_next
    - chewing_userphrase_get
    - chewing_userphrase_add
    - chewing_userphrase_remove
    - chewing_userphrase_lookup
  - Keyboardless action
    - chewing_cand_open
    - chewing_cand_close
    - chewing_cand_string_by_index_static
    - chewing_cand_choose_by_index
    - chewing_cand_list_first
    - chewing_cand_list_last
    - chewing_cand_list_has_next
    - chewing_cand_list_has_prev
    - chewing_cand_list_next
    - chewing_cand_list_prev
    - chewing_commit_preedit_buf
    - chewing_clean_preedit_buf
    - chewing_clean_bopomofo_buf
  - Bopomofo buffer
    - chewing_bopomofo_Check
    - chewing_bopomofo_String_static
  - Static API
    - chewing_aux_String_static
    - chewing_buffer_String_static
    - chewing_cand_String_static
    - chewing_commit_String_static
    - chewing_kbtype_String_static
  - Misc
    - chewing_new2
* Dictionary format:
  - Remove text data support
  - Introduce platform independent binary data representation
  - Move binary data to share/libchewing/*
* Userphrase format:
  - Support SQLite-based user phrase storage and manipulation
* New coding style:
  - Use scripts/indent.sh to change coding style
* Bug fixed:
  - Fix chewing_zuin_Check wrong return value #62
  - Fix numlock key cannot output number #45
  - Fix negative frequency problem #75
  - Fix cannot select candidate when symbol exists #79
  - Avoid clearing the buffer when Up arrow key is pressed and escCleanAllBuf is 1.
  - Fix cannot handle numlock 9 correctly #88
  - Fix invalid characters are committed when pre-edit buffer is full
  - Fix AutoLearnPhrase cannot fill correct wordSeq #108
  - Fix wrong auto learn when symbol in between #112
  - Fix missing rpl_malloc for cross compilation #118
  - Fix '\n' appear in symbol table #126
  - Reopen candidate list for symbols with down key #127 #135
  - Let up key close candidate list of symbols #131 #138
* Misc:
  - Add `make check' in cmake build
  - Change MAX_UTF8_SIZE to 4
  - Update official website URL
  - Use CreateFileA() instead of CreateFile() to stick with the ANSI API
  - Do not check phrase longer than MAX_PHRASE_LEN
  - Implement dynamic programming phrasing algorithm #73
  - Clean bopomofo buffer when mode change to English mode #89 #97
  - Update README to GFM.
  - Replace 'INCLUDE' with 'AM_CPPFLAGS' #68 #114 #116
  - Use [Shift]+[-] to input EM DASH (u+2014) as default #113 #124
  - Use Backspace to close candidate window #128
  - Use PgUp/PgDn to turn pages of candidates #129
  - Update Windows default search path #78
  - The word "zuin", "Zhuyin" are obsolete terms for \ 
"Bopomofo"
  - Add const whenever possible in several APIs
  - Toggle shape mode with shift-space #141 #142
* Successful stories:
  - chewing-windows-tsf project provides Text Services Framework
    support for Microsoft Windows.