First commits.
1. Added all author and SEP file details.
2. Working on abstract, detailed description, etc.
Added stuff to the SEP.
1. IPython Notebooks.
2. Discussion and a few examples.
Minor changes to fix readability
Readability again, fix code not within code-tildes
Used indentation instead for code
Added some of Cadair's changes to the SEP.
Made some formatting changes in the astropy.coordinates section.
Removed some lines.
These lines described the old debate regarding `SkyCoord` not supporting
Cartesian representation.
This debate was resolved a long time ago.
Changed the examples.
Brought them up to date.
Added some constructor examples.
renumber SEP
large updates to cooridnates SEP
Write some more.
Add some references.
Merge pull request #1 from Cadair/sep-coordinates

Sep coordinates
lots of comment fixes.
Merge pull request #2 from Cadair/sep-coordinates

lots of comment fixes.
Add output to advanced examples
Merge branch 'MySEP' of github.com:VaticanCameos/sunpy-SEP into sep-coordinates
third coords