removes unnessary makefile in the project root
adds build, adds the play_sin ccalls to portaudio.jl for testing
renames portaudio.jl to PortAudio.jl to match julia convention
comments out the reference code we're using to start PortAudio.jl
fixes const declaration
adds exports to module
now finds the custom shim library
apparently julia uses * for string concat. something about algebra...
some module reorganization
adds info on init so people aren't frightened by the device scan errors