Merge pull request #616 from apartensky/master

Tabs fix for angularjs/bootstrap upgrade
Added SelectionAddedEvent to MainPanelController and new MevSelectionService to fetch selections from server
SelectionsAddedEvent - fixed Limma modal no longer needs to query the server for selections
Fix issue with null column headers
ProbeAnnotations - fixed issue: after annotation lookup probes in the dataset which were not found in the lookup list  were ommitted from the annotions list