Fix WP-CLI bash completions, again

See https://github.com/wp-cli/wp-cli/pull/1270
Provisioned base boxes

We now have bas boxes that have already been provisioned with Salty WordPress so a new `vagrant up` is significatnly faster and more stable.
Ignore Pantheon CLI directory
Merge pull request #98 from humanmade/ignore-pantheon-cli

Ignore Pantheon CLI directory
Force host dns resolution for guest

Issue on osx 10.9.2 with virtualbox 4.3.8 where dns queries through certain programs like curl were timing out. Adding in config line from :https://leap.se/code/issues/1089 resolved the issue.
Merge pull request #99 from humanmade/force-resolution

Force host dns resolution for guest
Disable NFS entirely

Too many caching issues, and we added it originally for database shared directories which we aren't using anymore.
Merge pull request #100 from humanmade/disable-nfs

disable-nfs
Use the new WP-CLI installation mechanism

... instead of the old one, which was removed
Merge pull request #97 from humanmade/fix-wp-cli

WP-CLI 404s when attempting to install
Set `default_server` attribute for default Nginx config

If other server configs are included in `sites-enabled`, this ensures the default config is still used
Merge pull request #101 from humanmade/default-server

Set `default_server` attribute for default Nginx config
Run Nginx as `vagrant` locally

This ensures Nginx has approporiate permissions to run utilities like `stat()` when the files are owned by `vagrant`
Merge pull request #102 from humanmade/fix-nginx

Run Nginx as `vagrant` locally
Increase memory allocated to virtual machine

It's not the 90's anymore
Merge pull request #103 from humanmade/increase-mem

Increase memory allocated to virtual machine
Merge pull request #95 from humanmade/provisioned-base-boxes

Provisioned base boxes