ERT changes!
An ERT can now be requested via the communications console by anyone with a captain+ level ID - details will need to be provided in an input box. The request will be sent to Central Command (admins) who will be able to judge the reason given and see if an ERT is necessary. If so, they can use their "Dispatch Emergency Response Team" verb and choose a type of ERT to send to the station.
There are now four ERT types. Security, medical, engineering, and "custom". Each ERT type only opens a certain amount of slots for each role (Commander, Engineer, Security, Medic), which players will be able to choose from on joining the ERT. If a slot is full, they will not be able to join it.
Merge pull request #190 from Ishap/master

ERT changes! And a bug fix!