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.