Fix team name lookup. Close #24.

Added team.sitrack_name which pulls from ministry_locallevel.name
Major refactoring of models/sitrack

Based on Kenn's query, I am now grabbing si_applies.status and
ministry_newaddress.* for my data. And I am filtering by
hr_si_applications.siYear instead of sitrack_tracking.asgYear.

I'm not done with this yet, but I need to merge in the team_name branch
to continue.
Merge branch 'team_name' into fix_data_query

Conflicts:
	app/models/sitrack.rb
Add 'active' constraint/filters for Assignments based on status