WIP fixes for issue #22 and #23.
wip replaced svlexer with scala class.
moving to gradle
adding generated source to src/main/java for now
Various fixes to gradle build..
Cleaning up directories.
Added gradle wrapper.
Attempt to fix travis.
wip fix travis
wip
Updated to antlr 4.2.2 for massive performance win.
Switched from sbt to gradle.
Fixed travis build.