Initial commit for dev_resize_strip branch.

Copied changes from old repo.
Added Resize_Strip notebook to dev_resize_strip branch.

Development for resizing mpl figures to plotly defaults. Also allows style_strip, which only retains necessary structure and data.
Included mplexporter within matplotlylib for easier dist/install.
Included makefile for build/install. Changed setup.py.

The setup.py module now imports the mplexporter subpackage within
matplotlylib. It also imports the mplexporter/renderers/base.py file.

The makefile is setup to allow users to sync changes with the
mplexporter submodule, sync the current version of the mplexporter
submodule with the one packaged within the matplotlylib package, and
install the matplotlylib package.
Merge branch 'dev_resize_strip'
Added Resize and Strip Style to master notebook.
Cleaning up broken imports from moving mplexporter into matplotlylib.

It looks like a big commit, but it's really just adding and deleting
import statements.

Also, a bug in the resize function was fixed that threw a KeyError if
you tried to run resize more than once.
Updated to newest mplexporter.
Synced newest mplexporter commits into matplotlylib package.
Ran through NB to make sure it works and everything is clean.