server: Abort when server logic initialized (AS compilation error)
Moved Script* classes into own subsystem

It became clear that the Script management classes had nothing
to do in the campaign-subsystem, since they are "a little bit more
general" and are required in e.g. the object subsystem.
Create script::ScriptEngine in campaign::Manager
Implemented coupling between AngelScript and oms::GameObjects

Objects can now be created from AngelScript and are coupled
to an AngleScript class for object manipulation.

On initialization, init() is called and a step() method is
called periodicaly, for each frame.

Serialization/deserialization does *not* create script objects
on the remote side, yet!
Test-campaign extended to test object creation