Add navbar-inverse class to navbar

This is untested, but it seems like it should work.
Merge branch 'v0.2.0' into theming
Oops, I can't read documentation

Slash I just guess incorrectly.
Some SCSS tweaks

It doesn't need to be *that* dark, just *somewhat* dark.
Remove !importants and make a:hover look better.
Use newer hash syntax for navbar generator

(Due to point made in comments on a82324454806c5c18666508da1db39b26ddddcad)
Finish c2e40ae1a0eacba5b014719ffb2485a72caef745