fix String.rest
fix test
clean up syntax
clean up lazy impls
Add List.frequencies
fix parameter names + minor cleanups
very minor
add List.group()
fix Map.inverse
make Map.group() handle nulls better
fix incorrect test
fix pseudocode definitions
clean imports
print everything in 1 line
Object and Boolean are now reserved words (preceded with $)
metamodel for SequenceBuilder/Appender, Array reserved word
fix doc strings
fix code example
fix #372 return type of process.readLine()
fix signatures and a bug in Singleton