v0.9.9 - final Python2-compatible release

• The decorator @parse_variables(__doc__, globals()) replacing exec parse_variables(...)
• Support for the MOSEK9 exponential cone solver. Install with pip!

And some things that are best seen in the docs:

• New and improved printing.
  • v0.9.1: A >= 2*s_(0,)*s_(1,) + 2*s_(0,)*s_(2,) + 2*s_(1,)*s_(2,), V <= s_(0,)*s_(1,)*s_(2,)
  • v0.9.9: A >= 2*(s[0]*s[1] + s[1]*s[2] + s[2]*s[0]), V <= s[:].prod()
• New syntax for modelnames.
  • v0.9.1: E_PowerSystem/Battery
  • v0.9.9: PowerSystem.Battery.E
• Dictionary constraints (which print nicely in addition to allowing easier access)
  • {"definition of Re": Re == rho*V*c/mu, "definition of D": D >= 0.5*rho*V**2*CD*S}