More tests/refactoring on GenerateBasicSite
Render tags into header
Implement test for filtering, but haven't written the js for it yet
Move Rake back into dev deps, add rack
Add `rake preview` so we can easily play w/ CSS/JS
Namespace test tasks, better info messages when previewing
Rename `rake preview` -> `rake serve`

Preview implies I should see my real data
Example of where style would go