Merge pull request #4 from Cadair/master

Add meta data to the notebooks and add a footer to the index page.
added SunPy overview notebook first presented at 13th RHESSI workshop
saved metadata
small fix
fixes based on comments
added lightcurve tutorial notebook, removing the output and commits thereof.
changed section name in metadata.
Merge pull request #11 from aringlis/master

Added a lightcurve tutorial for the gallery - v2
update to section heading
added section_name requirements
Merge pull request #5 from ehsteve/master

Added SunPy overview notebook first presented at 13th RHESSI workshop
Change everything to new section headings.
Merge remote-tracking branch 'upstream/master'
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