Added empty grails app.
Provisioning VM with tomcat.
Revert "Provisioning VM with tomcat." (I'll do this later, after jenkins is setup).

This reverts commit 3f483d99a93442321ba8d1dd84897826ef17fe56.
Added jenkins VM.
Added 'bookshop' cookbook, which currently just installs the grails plugin to jenkins.
Renamed cookbook for consistency.  Installing grails on jenkins. Reordered VMs (jenkins must be installed first).