Update to 0.6.14; from new maintainer Jacob Meuser <jakemsr@jakemsr.com>.
Notable changes:
- new import module for bktr(4) devices, import_bktr
- new import module for audio(4) devices, import_sunau
- export profiles
- better error checking
- uses YV12/I420 colorspace by default instead of RGB
- uses external ffmpeg/libavcodec
- optimized memcpy on i386
- many small bugs fixed