Fix JETPACK_DEV_DEBUG

The logic was reversed. It should be enabled in Vagrant on nowhere else.
Move apt-get upgrade to main section

We don't really need this to run before everything else,
so there's no reason to force it to.
Make wp-content group writable

Fixes #364
Also set proper ownership of wp-content directory

See #364
Bump puppet-wp version
Make sure the necessary directories in wp-content have group write
permission.

See #364
We don't need to ignore wp-cli, we moved it inside the VM.
Add .gitignore specific to www directory.

This will be useful when/if we decide to split the www directory to
its own repo.
Ensure vip themes repo exists
Merge branch 'master' into feature-rsync