ignoring src-gen and pp library java files
add clean target as external builder
adding sdf3 pp library to the classpath and building a ctree
builder to sdf3 conversion
generating pp library
lifting labeled symbols to template
formatting sdf3 grammar
lift to sdf3 (templates)
fix bootstrapping issue of generating src-gen folder
pretty printing lifted ast
fix generation of templates
formatting sdf3 grammar
new sdf3 pp