HUE-950 [core] Upgrading to the new trash and permission API

Converting the Pig app, Beeswax, Impala and Oozie apps
HUE-950 [core] Initial restyle of the page
HUE-950 [core] Added UI for tags
HUE-950 [desktop] Initial review comments
HUE-950 [core] Updated tags UI
HUE-950 [desktop] Adding icons to the document list
HUe-950 [desktop] Adding tests
HUE-950 [core] Adding tests for tagging and documents