reverting ctypesgen changes
Mosek solver now returns solutions to dual
GP sweeps now consts looking like ('sweep', vals)
First try at Constraint Set class
Refactored nomials, allowed variable names...

...began testing variable sensitivities, implemented O(N) substitutions in
GPs, added the ability to load/save cases to GPs, cleaned up the printing
of the examples...
Merge branch 'master' of https://github.com/appliedopt/gpkit

Conflicts:
	ctypesgen.py
Add mosek_cli to path during build and generalize mac home directory