Issue #57 - Change HDFS viewer header to new page header classes.
Issue #57 - Change tabs to nav-sm.
Merge pull request #59 from davidzchen/condense-ui

Reduce UI whitespace
Renamed variables to make them clearer, fixed indentation and column width issues
Fix for issue #58: clean up Reportal mail temp directory
Added finally block to make sure we close our Scanner (and the underlying stream) even if there is an exception
Merge branch 'master' of github.com:Erwa/azkaban-plugins