Merge pull request #5 from FranklinChen/master

Update ANTLR3 version from 3.3 to 3.4
Updated antlr dependency to version 3.5
Updated more dependency definitions
Updated readme
Fixed repository path in readme. Closes #6
Migrated from full configuration to build.sbt
Addded sbt-cross-building plugin in order to compile / publish for 0.12 and 0.13
Merge pull request #8 from melezov/master

Version for 0.13.x