First Attempt At Vagrant Install & Updated Docs

Added .vagrant to gitignore
Merge pull request #1096 from bensternthal/vagrant-docs

First Attempt At Vagrant Install & Updated Docs
Bug 736934 - Fix the redirects for Beta relnotes

Resolved http://bugzil.la/736934#c16. Tests are always important…
Merge pull request #1182 from kyoshino/bug-736934-redirector-fixup

Bug 736934 - Fix the redirects for Beta relnotes
Added in docs for vagrant install. These should have been in my other PR, but during
the rework of it I forgot to add these.
Merge pull request #1183 from bensternthal/vagrant-doc-fix

Added in docs for vagrant install. These should have been in my other PR...
Bug 905532 - [404] mozilla.org/MPL

A quick fix. This doesn't work:
```
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
```