Added MOSEK ctypes & CLI: twice as fast as CVXopt

the CLI interface currently spams a 'gpkit_temp folder
mosek_interface_example.py superseded

by _mosek.expopt.imize (which implements ex1()) and simple_gp_example.py
(which implements ex2)
Added docstring to vectify
Small bugfix in CVX optimizer
README tweaks
pep8
upload legacy m code
add a test
Reorganized the examples directory

(formerly known as test_driven_development)
Added Import warning for expopt.py, and cleaned up
Cleaned up example GP script

and switch to using the default solver
Changed the testing folder's organization
pep8