Removed site folder.

Prep for adding it as a submodule instead.
Added nooline submodule, and default template.

Now the content will be tracked as its own versioned repo!
Site specific repos.

Now each site, and all relevant config data for it, comes from a git
submodule repo within 'sites/'.
Site-specific content versioning!

Now each of the content updates gets versioned, and committed to git.
Merge pull request #8 from nooline/feature/content-repos

Site-specific content repos.