Lang: fix AbstractLangLabelProvider
Fix Travis CI for UI tests.
Lang: Minor resource/tests additions.
Lang: require Eclipse Luna SR1

Conflicts:
	feature/feature.xml
	releng/target-platform/IDE.target
Lang: AbstractLangLabelProvider stylers.
Add GOPATH info to operations console
Correct lib-path argument for gocode.
Intermediate: prepare "go build" builder. isProjectInsideGoPath API.
Lang: added LangToolingTestResources.
Lang: added LangToolingTestResources.
Lang: Disable autobuild in tests.
Intermediate: add findSourcePackages API, enable new "go build" builder.
Deleted old experimental source.
Lang: lang and util additions, method rename.
Added new GoBuildOutputProcessor.
Lang: added PathUtil, minor updates.
Added new 'go install all' GoBuilder.
Remove deprecated code.
Rewrote builder clean.
Lang: LangProjectBuilder update.