fixes to the FITS citation
remove duplicate line in Sec. 2
added full stop to foot note, Sec 2.
cleaned up map instrument list
cleaned up HMI listing in 2-1
commas, not semi-colons
HEK reference cleaned up
HEK text cleaned up a bit
HEK text cleaned up a bit
helioviewer section cleaned up
Merge pull request #162 from wafels/master

Edits to citations