fix build.xml and ref latest antlr 3.5; tweak README for 4.0.7
clean up readme
clean up CHANGES
Added Ant build folders to .gitignore
Build fails if grammar compilation fails
Generate grammars in a separate intermediate build output folder
Include generated grammars in source zip for debugging purposes
Pass the -Xlint -Xlint:-serial options to javac
Faster build if we don't fork the ANTLR task
Improve build performance avoiding an unnecessary directory copy
Specify input and library directories for in-process execution of ANTLR Tool
tweak for final lib ref
get final ant output