General Website Updates

* Added a README to make it a little more obvious how to get started altering the site
* Added a 'Projects' page to list the active projects and link to GitHub
* Removed the date and author labels from the side bar. The dates just point out when we haven't touched anything and the individual author attribution on each post seems out of place on a community effort project. 
* Added a custom home page that encourages people to join us directly, either at meetings or via GH or gitter. Also mentions and links to the CoC.