Ported spritesheet exporter to node
Added support for multiple source directories
Started writing video to image sequence exporter

Cleaning up files
Renamed src images
Cleaned up example
Added synchronous exporting

Added src_scale and frame_scale
Merge branch 'refs/heads/new_exportor' into bootstrap-sequencer
Updated description
Removed dependancies info to readme
Updated sequence and sprite sheet paths
Added dependencies
Added link to examples