Rewrite of Haxe debugger plugin to use the new Haxe v3.0 debugger.
Fixed some bad logic in haxe debugger dialog.
Added a minor note to the haxe plugin noting the new debugger support.
Improved dialogs during error conditions.
Added disabled "set expression" support.
Revert some incorrect changes to project structure and stuff.
Tried to make the JavaProtocol.jar library be included by default in the
project build instead of having to be jammed in as an SDK classpath.
Updated the build, not sure if this was necessary.