Implemented xvfb install/config for Jenkins role
Implemented Java Runtime installation
Added Jenkins installation.  The apt package also creates
the user and installs jenkins as an init.d service
Install Jenkins and Java
Install Jenkins plugins (except Maven, which causes an exception)
Added (start of) browser script
Update ansible scripts for the jenkins vagrant box
Update ansible scripts
Add main.yml
add edxapp sandbox
Add edxlocal main