Some cleanup.
More cleanup.
Changes to pourbaix plotter for better contrast between patch color and font color; Also fix bug in structure analyzer, and add unit test for oxide compatibility.
Test with MP Rest interface replace with local file
Minor cleanup
Move ionic radii file.
Zkip zeo test.
Remove more zeo test.
Change to Structure/Molecule API. Now both inherits MutableSequence and
implements __setitem__ and __delitem__. Effectively, Structure and Molecule now
functions like Lists. You can now do the following:

structure[0] = "Fe"
structure[0] = ("Fe", [0.5, 0.5, 0.5])
structure[0] = PeriodicSite(....)

Same API for molecules.

Even better, now list functions like reverse, extend, sort are automatically
part of Structure and Molecule.
Fix doc.
Add more deprecation messages.
Fix bad path.
Fix bad path.
Further enhance list-like API to support adding properties.
Update docs.
Increment minor version number.
More updated docs.
Change log and examples update.
Improve fabfile.
Improve docs a little.
More minor doc fixes.