Update to 0.13.7.5:

Version 0.13.7.5 (2014-08-22)
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- Fixed Gentoo bug: https://bugs.gentoo.org/show_bug.cgi?id=518904 (PHP lexer)

Version 0.13.7.4 (2014-07-29)
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- Enabled 'make docs' only if configured with '--enable-docs'
- Disallowed to use yacc/byacc instead of bison to build parser
- Removed non-portable sed feature in script that runs tests

Version 0.13.7.3 (2014-07-28)
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- Fixed CXX warning
- Got rid of asciidoc build-time dependency

Version 0.13.7.2 (2014-07-27)
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- Included man page into dist, respect users CXXFLAGS.

Version 0.13.7.1 (2014-07-26)
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- Added missing files to tarball

Version 0.13.7 (2014-07-25)
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- Added UTF-8 support
- Added UTF-16 support
- Added default rule
- Added option to control ill-formed Unicode

(wiz)