a few minor changes to Intro.
merge changes from @Cadair
tiny edits to Map and Lightcurve
edits to lightcurve example code
minor edits to Spectra section
one typographical correction to HEK
minor typo corrections. Added a brief introduction to Section 3 (data search and retrieval)
fixed lack of linebreaks
one-word edit to Util
more minor edits and comments to SolarSoft section.
some edits to HELIO section.
Merge pull request #65 from aringlis/master

Passing the football...mostly small edits throughout the paper.