Gherkin support

Hacked into shape from this
https://github.com/cucumber/gherkin-syntax-highlighters
Ignore RubyMine cruft
Capture do, end, /^step def text$/
Gherkin test (I think)
Gherkin done
Step Defs

I think this is a bit simplistic, but it works
Add support for interactive ruby sessions (irb)
Add x86asm syntax highlighter
SQL: Handle comments inside statements fixes #418
SQL: Updated author list
SQL: Added literals and built_ins
SQL: variablize comment mode
SQL: De-duplicate keywords, literals, and built-ins
Replace cyrillic 'и' by 'and' to avoid LaTeX error

Hi,

Currently there is a LaTeX error caused by a cyrillic letter in spec/text_spec.rb. I am proposing to replace it by its English translation 'and'.

Thanks.

Cédric
Merge pull request #422 from boutil/patch-1

Replace cyrillic 'и' by 'and' to avoid LaTeX error
Merge remote-tracking branch 'Burstaholic/master'
Add Travis Odom to authors, update SQL modes CSS reference
Merge remote-tracking branch 'innocenat/x86asm'

Conflicts:
	AUTHORS.en.txt
deal with trailing commas errors
Merge pull request #423 from teambition/trailing-commas

Deal with trailing commas errors