Cleanup package, remove dark because this is a light theme.
Cleanup invalid CSS

Probably from a rebase?
Add CSS Lint Definitions
Fix invalid CSS listing.
Fix cursor selector
fix empty selector
Change 0px to 0
Remove webkit prefix.
Remove Universal selector.
Remove things we aren't supposed to theme.
Remove forced font selection and size as the user can set that.
Remove more things we aren't supposed to theme and spacing.
Set background and remove overqualified cursor.
Remove fontweight on comment.
Remove margin on line bg.
Remove more unneccessary classes.
Remove unneccessary div
remove .CodeMirror-gutter
remove unneccsary span
Remove codehit on bold tag.