MXMLC says -is is a valid alias for -include-sources
Also add flash.events.Event as import for [Bindable] classes.  Looks like MXMLC used to do that
[Bindable] class with toString needs to have it converted to be an override
revert auto-importing flash.events.Event.  It isn't always needed so we shouldn't always add it
move creation of CompilerProblem so it is only created when needed
Output an Ambiguous error if type is ambiguous.  In one case, an identifier was imported from another package but also existed in the package.
Missing resource bundle is now a warning