test_pitch.py: added simple tests for pitch
Merge branch 'develop' into io
added boilerplate for media source and sink
src/io: moved sndfileio from examples
src/io/sink.*: fix prototypes, draft implementation
src/io/source_apple_audio.{c,h}: added simple file read using ExtAudioFile
src/aubio.h: add source and sink
examples/utils.h: moved file
tests/src/io/*.c: add simple tests
tests/src/io/test-source_apple_audio_file.c: do nothing if not on apple platform
src/io/source_sndfile.{c,h}: added sndfile source
generator.py: update skip list
src/io/source.c: fix include path
src/io/source.h: use uri not method as parameter name
gen_pyobject.py: improve, also parse io/source
test_source.py: added simple test
src/io/source_sndfile.c: return NULL before trying to allocate memory, clean up
added sink_sndfile.c draft
src/io/source_sndfile.c: avoid segfault when deleting NULL
src/io/source.c: do not try to delete if NULL