Merge pull request #1 from mkelley/dev

Make mskpy a fully fleshed out library.
Added mskpy.image to setup.py modules
Merge pull request #2 from mkelley/setup-include-modules

Added mskpy.image to setup.py modules
Added SolarSysObject.ephemeris.
Merge pull request #3 from mkelley/ephemtables

Add SolarSysObject.ephemeris.
New SolarSysObservable, and make comets and asteroids subclass it.

SolarSysObservable is a SolarSysObject that emits light via the fluxd
method.
Merge SolarSysObject and SolarSysObservable, add lightcurve method.
whitespace fix.
Merge pull request #4 from mkelley/lightcurve

Add the ability for SolarSysObject to estimate fluxes.
Update README.rst
Re-factored ephem.
Pass on ephem ImportError.
Move ephem.core load_kernel lower in the file.
Added some not very strong tests of ephem.
Added geom tests.
Merge branch 'master' into refactor-ephem

Conflicts:
	mskpy/ephem.py
Merge pull request #5 from mkelley/refactor-ephem

Make ephem as sub-module.
Move _date2time to util.date2time.
New State class.
Updated comet for State.