Log Message:
Update ruby-parser to 3.6.4.

=== 3.6.4 / 2015-01-16

* 1 bug fix:

  * Removed shebangs in tests because of bugs (aka 'features') in RPM packaging \ 
tools.

=== 3.6.3 / 2014-09-26

* 1 bug fix:

  * Fixed bug caused by latest version of oedipus_lex not exporting lineno accessor.

=== 3.6.2 / 2014-07-18

* 1 bug fix:

  * Handle return/next/break/yield w/ block call (WHY).

=== 3.6.1 / 2014-05-12

* 1 bug fix:

  * Strings that don't match the encoding of the file are now returned as ASCII-8BIT.

=== 3.6.0 / 2014-04-23

* 1 minor enhancement:

  * Added new_string and switched all parsers to it.

* 1 bug fix:

  * Fixed line numbers of nodes following multi-line strings. (presidentbeef)

=== 3.5.0 / 2014-03-24

* 1 major enhancement:

  * Added initial support for ruby 2.1 syntax. Doesn't have numeric extensions yet.

* 2 minor enhancements:

  * Converted ruby_lexer.rex to use new grouping mechanism. ~15% improvement in \ 
speed.
  * Various lexer cleanup.

* 2 bug fixes:

  * 2.0/2.1: Fixed block kw args.
  * Fixed env for kwargs and friends.