Force sudo as root when installing httplib2, fix: rvm#5

Fix the httplib2 package name

Reference the new name

Fix idempotence test to expect 0 changes

Add web category

Test to make sure ruby does not exist then exists afterwards

Fix default ruby selection for both local and system installs

Add --default flag to rvm use

Upgrade the default version to 2.1.2

Fix a bug with how the upgrade task checked for rvm