rewrite of the database section
edits to the developer section
update to Map section
updates to Lightcurve section
Merge remote-tracking branch 'ehsteve/draft2' into draft2
some edits to Util section.
more edits to util.
added short section on Instruments to Util
typo fix
clarify that SQLite is not the default dialect (there is no default at all)
typos
Merge branch 'draft2' of github.com:ehsteve/sunpy-0.4-paper into draft2

Conflicts:
	3-5-Database.tex
Edited the VSO section
Edited the HELIO section
More edits to HELIO section
Minor edit
Minor edit
shorten intro, add a comparision to solarsoft section
Add the intro changes!
added an optional paragraph about Instruments to util.