Add computation of demand by track/triage
Add net avail computation
Condition "Soprano" to "Tenor"
Rewrote QPlan filter functions

        - Getting tracks, skills, trackWork, trackStaff, and trackDemand
Compute net availability
Add track feasibility computation
Add render of track stats
Map Austin to Mobilize
Make Person an instance of Ord
Add render of track staff

        - Also sorted staff by name
Add feasibility to work output
Move getWorkManpower to Work
Remove test function
Add comments to QPlanApp
Revise comments in Work.hs