sounds changed from strings to tuple of string double and int
added length() for arrays
finished length() for arrays. updated test
Merge branch 'soundTypes' of github.com:peterxu422/PLTCompiler into soundTypes
added getPitch() for sounds and pitches
added getAmplitude and getDuration and their respective tests
pitches are now more than just strings
Merge branch 'soundTypes' of github.com:peterxu422/PLTCompiler into built-in-functions
made getPitches work for our new Sound stuff
fixed assign test for new print function
Merge branch 'soundTypes' of github.com:peterxu422/PLTCompiler into built-in-functions
brought in master updates
arrays pad out with types
return index out of bound error instead of cryptic ocaml error