Fix #IDEUI-214 Add status icon to builder tab

Add a status icon to the builder tab giving indication on the status of
the current working builder or the last one launched if any.
Merge pull request #185 from stephanedaviet/IDEUI-214

Fix #IDEUI-214 Add status icon to builder tab
Bind BuilderServiceClient in CoreModule
IDEUI-178 Top Menu: hover feedback + better open state
Merge branch 'master' of github.com:codenvy/ide
IDEUI-210 Editor title is no more underlined on error/warning