Simplify DOM manipulations
Add `.VimFxReset` class automatically
Remove unnecessary code
Simplify `utils.createElement`
Call `utils.createElement` consistently
Merge branch 'develop' into simpler-dom

Conflicts:
	extension/packages/button.coffee
	extension/packages/find.coffee
Use `.classList.toggle()`

Instead of `.classList[method]()`. Much nicer.
Merge pull request #219 from lydell/simpler-dom

Simplify DOM manipulations