More consistent formatting.
Merge remote-tracking branch 'upstream/master'
Added ABNF grammar.
Merge remote-tracking branch 'upstream/master'
ABNF formatting
Updated WebIDL grammar.
Updated WebIDL to draft 6 November 2013.
Modified Smalltalk grammar according to local tests.
Fixed an error with the grammar parsing multiple expressions. Problem was in definition of UnaryMessage.
Update and rename README.txt to README.md
Merge pull request #35 from stokito/patch-1

README code highlight
Merge remote-tracking branch 'upstream/master'
Fixed error parsing an stInteger.
Fixed a few errors with parsing empty blocks. Still have issue parsing single character identifier.
add antlr 4 grammar
Merge branch 'master' of github.com:antlr/grammars-v4
rm package statement
rm superClass
Improve Lua gramma for supporting string contatination with '\' and shebang (#!).
Support comment with long brackets.