New job state of warning and display a set of warnings about possible problems with a map reduce job.  Also, collect the number of records each map/reduce job and warn if a job does not write out any records
detect and store warnings via a callback from the lipstick ppnl
source presence of warnings directly from jobStats record rather than calculating them in the UI
fix rending of warnings
can't mock the JobStats class as it's made final so this is basically impossible to test
Merge pull request #23 from mortardata/mroddy_track_output_records

Track output record counts per job, warn if zero