Incorporated a search for globally defined symbols.
Downward-walk through the PsiTree to find global definitions of symbols
Tried to fix the issue that local variables stay colorized, even when the localization circumstances have changed.
Merge branch 'develop' into feat_globalSymbolResolve
Changed the way how symbols are found which are really *set* in the lhs of  :=,  /: :=, ... This is not finished and needs further work.
Added guava library since now the google collection tools seems to be in there.
Removed comment
Merge branch 'feat_globalSymbolResolve' into develop
Refactored package names.
Removed unnecessary extension points
Removed CompletionConfidence since it seems no longer be in use
Build new release