Add filters to capabilities
Ignore header lines when requesting codecs
Fix filters extracted with trailing spaces
Add capabilities tests
Enable query capabilities without instanciating command
Fix bogus constructor and fix tests
Add capabilities documentation
Add njoyard to contributors
Enhance filter capability support
Augment test timeouts
Use more reliable RTMP test stream
Merge branch 'add-filters' of github.com:njoyard/node-fluent-ffmpeg into njoyard-add-filters

Conflicts:
	lib/capabilities.js