#27: Added the text-select state capability to MuisElement
Made some improvements and added tracking information in MuisEventQueue
#27: Fixed a few bugs with the document model
Fixed some bugs with parsing style sheets
Added the ability to listen to an InternallyStatefulStyle's state
#27: Added stateful style for text selection
#27: Implemented text selection behavior
Fixed a scope warning
#27: Fixed some problems with styles in the document model
Added listeners for content and selection changes