close wave_proc after termination to prevent accumulation of file handlers
updated audio to fix errors when killing aplay
updated for newer audio handling
Merge branch 'master' of git://github.com/gentnerlab/pyoperant

Conflicts:
	tricks/evidence_accum.py
fixed syntax error
cleaning up a bunch of errors from debugging
Merge branch 'dev'

Conflicts:
	pyoperant/hwio.py
adding evidence_accum back in to master
Merge branch 'dev'
Merge branch 'dev'
using new audio management