Sass: Remove config.rb files (no longer used)
Merge branch 'sass-cleanup' into develop
Optimize: Widget router callback priority

Closes #152
Merge branch 'iss-widget-callback' into develop
Optimize: Remove call-time-pass-by-references (deprecated)
Merge branch 'rm-pass-by-references' into develop
Update readme (2.2.2-b2)
Update version (2.2.2-b2)
Merge branch 'release-2.2.2-b2'