Rename 'Civility Policy' -> 'Code of Conduct'
Refer to the Ruby workshop instead of January
Refer to the workspace directory in example command prompt

Just to make it look a tad closer to what they might see. Might also ensure that
they're in the right directory when they're doing this.
Remove redundant instruction to create workspace folder
Merge pull request #160 from railsbridge-boston/code-of-conduct

Rename 'Civility Policy' -> 'Code of Conduct'
Update VirtualBox and Vagrant minor versions for September workshop

These are the versions that will be used to build the VM. Looks like
only minor updates.