Setup script for LocalSupport on Ubuntu 12.04 VM

Tested and seems to work well. Just have to enter password at the start and then no other interaction is necessary. Updates RVM and Ruby if necessary. If not necessary, Ruby update outputs a Usage screen and continues without issue. Does all necessary setup steps and outputs a message upon completion.

NOTE: This needs to be in master branch so it gets pulled with clone. Also, the similar file that was created in develop branch should likely be deleted to avoid a merge conflict when pulling that branch which causes the script not to work correctly.