Commit for initial *working* version of graph_objs.

Lots of questions are pretty open-ended at this point. However, this is
a fairly detailed first-crack at giving users a python *interface*
without ruining the declarative nature of plotly.
Added a testing framework. Intended for use with `Nose`.

All tests in the `test` directory are for the new graph_objs.

Haven't used Nose?
------------------

```bash
pip install nose
nosetests -w tests -v
```

Where -v is the verbose option. I use the *new-ish* `@raises` wrapper
for exception testing, you may have to upgrade if you haven't paid much
attention to your nose.

```bash
pip install --upgrade nose
```