Release 2.0.4 version bump and rockspec added. Also fix issue kernels…

…auce#237 add OSX to rockspec platforms.

Staging for version 2.0.3.

Version 2.0.2 release rockspec and version bumps.

Add rockspec for v2.0.1

Fix for Github Issue kernelsauce#211.

Fix for Github Issue kernelsauce#211.

Bump version to v1.1.6.

GH Issue kernelsauce#204. Bump version to v1.1.5.

Added documentation for signal handling.

Updated versioning info for new release.