Formmating updates to SEP3
Add the first draft of SEP-3 which descibes a LightCurve Factory.
Add more detailed API examples to SEP3
Merge branch 'master' of github.com:Cadair/sunpy-SEP
Add mailing list link
Renumber to 4
Merge remote-tracking branch 'upstream/master'
Update the LC SEP with Unified Downloader stuff.
remove `timerange` from the Lightcurve init
formatting tweaks
update date of last revision
Merge branch 'master' of https://github.com/Cadair/sunpy-SEP
Examples added