Added ADT transformation definitions.
Merge branch 'master' of https://www.github.com/cwi-swat/rascal
Merge branch 'master' of https://www.github.com/cwi-swat/rascal
Cleaning up code. 
Change name of keyword parameter in command vega:
variable="command"
becomes
command=command(args)
Merge branch 'master' of https://www.github.com/cwi-swat/rascal