Add office to the available Keywords

I think it might be helpful for those users with multi office organized servers to allow the use of the office as a keyword in the post task action.

In our offices the file path looks like this: //servername/office/project name/

If we could leverage the assigned office parameter set during the project startup it would dramatically simplify our project startup process.

This would allow us to set post task action paths in the task templates as \\servername\[office]\[Project]\ and eliminate the need for template tasks that are specific to each office.