Add back background
added info about sunpy org in about.html and about sep in contribute.html
fixed links
fixes issue #28
Merge pull request #27 from Cadair/stu_theme

Add back background
fixed history statement
small correction
Merge remote-tracking branch 'upstream/master' into issue28
Merge pull request #30 from ehsteve/issue28

Fix for issue #28
Merge remote-tracking branch 'upstream/master' into blogentry