More TODOs.
Converted the GTK+ custom stylesheet to a single string using CSS comments because cgo complains about the current one. While I'm at it, also remove the need for the null terminator on that string. Thanks to various people in irc.gimp.net/#gtk+ (grawity, dro|desrt, Company) and irc.freenode.net/#go-nuts and the Gopher Academy Slack.
More TODOs.
Made LineEdit horizontally scrolling on Mac OS X. I'm not sure how I missed this before o.o