Add oniguruma based matcher and filter replacement for re2: fixes #361

I implemented oniguruma based matcher/filter that almost runs compatible with re2 (options: Perl and UTF-8).
See the design note wrritten in Japanese: https://gist.github.com/suma/6710797

I made fv_convertger tests disabled googletest regular-expression feature by wscript modification(Added `-DGTEST_HAS_POSIX_RE=0` to cxxflags). They seem not to use that feature and death-test.

This PR doesn't contain these modification.

* `re2_splitter` plugin elimination
* RHEL/Deb metadata dependencies
* homebrew and jubatus-installer
* Travis CI build script