Improvement for Java constructor PO's - show package hint instead of owning class name.

[mq]: indent-on-paste.patch

Oops, fix for previous commit: avoid duplicate characters inserted when completion is unambiguous.

Fix in parse node finder - do not return any node when in comment. This effectively inhibits code completion in comments.

Bug fix in completion (#updateSelection). When selection in code completion view is updated, take in an account a key just typed. The character may not be processed (and this inserted in text) by textView's in case #updateSelection is called in CompletionController>>handleKeyPress:x:y:. so the character just pressed must be passed down (hence #updateSelectionAfterKeyPress:). Also, care for empty lines which are not even in textView's list - TextView shrinks list to last non-empty line so `textView list at: cursorCol` may lead into index out of bounds.

Fixes for token matcher: correctly (re)set position backwards. Support position (re)set even in cases there are not enough tokens in token cache. This is done by remembering both token position and source position in the underlaying character stream. If position is outside cached token range, clear token cache buffer and set source's stream character position.

Bugfix in EditService>>unregister: call super unregister at the end of the unregister method.

Fix in SmalltalkCompletionEngine (senf allClassesDo: instead classesDo: to JavaVM registry)

Bugfix in SmalltalkCompletionEngine - do not send obsoleted #name: to class PO.

Initial set of tests for GroovyCompletionEngineSimple (along with some fixes)