Removed function power operator (the function composition operator is powerful enough to cover it)
Removed reference (definitively) and added the '~' pure symbol operator
Fixed __call override in Falcon classes
if statement wasn't accessing the symbols
elif branches wasn't accessing the symbols
Fixed x = x semantics.
Fixed serialization of class Unpack
Fixed serialization of class MultiUnpack
Direct call of statements didn't cause their execution
Treestep & multiunpack didn't execute literal unquote on selectors
Now defineSymbol can return null, in which case a local symbol should be implied
Fixed store/restore of return flags in serialization
Unquote was taking the source expression as-is, causing double deletes. Clone is needed to acquire proper ownership
Fixed nilling ungiven parametrs in scripts
Fixed function compositions with multiple parameters.
Fixed function power.
Added more tests
Added support for language bound regular expressions
Added RE2 files; will need a good deal of pruning
Added --cat option to pick just one category in testing; also not doing trim on lines during @output block parsing