Added aliases to the shell to quickly Stop a currently Active Task (`tas`) or to quickly log a currently Active Task as Done (`tad`).
Since I am striving for closer connection between my task management, my mail suite and my calendar appointments, it makes sense to unify all 'office' tasks into the single office module instead of keeping taskwarrior outside of it.
Reflecting the somewhat expanding scope of the module, renamed it to office. Still keeps the old files and setups but also got a new README file.