Decoder : Add a live decoder using Gstreamer alsasrc
LiveDecoder : first prototype for a live decoder. The process can be interrupted by pressing CTRL+C two times
LiveDecoder : Add doc + doctest example
split decoder modules
encoder: rm core from init
Decoder : Fix issue #29 about bad start parameters for FileDecoder. Also deals with bad duration add a test to manage both cases. Minor changes in FileDecoder induces by this bug fix
tests/sandbox: Fix issue #28
fix fft_size arg for spectrogram
fix division from future (explicit import in EACH module)
add __future__.division to LiveDecoder also
Merge branch 'live' into dev

Conflicts:
	tests/test_decoding.py
	timeside/decoder/core.py
fix doctest decoder module import
bugfix
LiveDecoder.input_src as constructor arg
Encoder: live AudioSink encoder, encoder that plays the audio stream through the sounbdcard
Merge branch 'diadems' of github.com:yomguy/TimeSide into diadems