Feature goes

Hi!

This is a module for downloading, plotting, and analyzing GOES x-ray day for the purpose of identifying Solar Flares.  The module consists of the following functions:

*********************
**Module**: gme.sat.goes
*********************
**Functions**:
        * :func:`gme.sat.read_goes`
        * :func:`gme.sat.goes_plot`
        * :func:`gme.sat.classify_flare`
        * :func:`gme.sat.flare_value`
        * :func:`gme.sat.find_flares`

There is a test script at the end of davitpy/gme/sat/goes.py, as well as a notebook demonstrating its use and capabilities in davitpy/docs/notebook/GOES.ipynb.

Please note that this module uses the pandas and netcdf4 libraries.  davitpy/install/debian_dependencies.sh has been updated to include the dependencies.  I added pandas to the mac scripts, but those are not tested and I do not believe this module will work on mac at this time.

So, please re-reun debian_dependencies.sh before testing this code!

Take care,
Nathaniel