Moved new classes into Maven structure.
Added null check for missing association support.
Disabled out of date tests.
Merge branch 'cell-support' into mavenization
Better support for polymorphism with association support.
Merge branch 'cell-support' into mavenization
Added listener api for matrix cell selection.
Fixed bug preventing writing of support for multiple states in one matrix cell.
Initial implementation of state support view interface.
Merge branch 'cell-support' into mavenization
Moved classes into maven structure.
Imports cleanup.
Merge cell-support branch.