Made the mission simpler by starting and ending it at the construction site.

Made the mission simpler because people can't read simple instructions.
Added foreman messages to help players remember instructions.

Minor improvements

A few minor fixes.

Now unlocked for all players regardless of XP.
Now using the home base in the Village instead of the one in the city.
Office building roof now has climbable stairs for going back to TARDIS, and some deck furniture. Also a secret, invisible walkway to nearby rooftops.
A few minor adds and corrections.