Fixed incorrect worlds, cleared sub text: it was not readable

Formatted feature list

Added pull-requests guide, placed contributing block to bottom
Merge pull request #36 from mli-max/patch-1

Fixed readme
fixed pocorall/scaloid#35
added a tip
changed `spawn` -> `future`
Move base ST group file into build project
Unwrap widgets
Remove _defaultValue helper
Wrap invalid method names in Scala with backticks
Add more reserved keywords
Initial companionSTGroup support
Resolve listener duplication
Define class bodies in companion stg file
WIP - constructor generation
WIP: Extract deeper type parameters
Extract constructors with parameter names automatically
Add TODO
Fix inner class naming

cleanup
Add custom constructor parts
Move SArrayAdapter to Widget.scala