Remove more half-baked code.

These will likely be replaced with some things on branches.
Update license to BSD 3-clause.

Denote MetPy developers as copyright holders.
Put some basic content in README.

This includes a brief description, as well as a warning about potential
future API changes.
Fix bold in README.
Rename README so it gets parsed as Markdown.
Really fix bold this time.
Clean-up setup.py some more.
Iterate over a copy of locals.

This way we don't iterate over a dictionary that we are actively
changing.
Clean up __init__.py files.

This simplifies the files, as well as fixes problems on import on Python
3.3.
Add configuration for Travis.
Add current Travis status to Readme.
Merge pull request #1 from metpy/travis

Add Travis CI testing.
Add cut at making SkewT plotting class.