0.5: Completion of Construction Workforce Points User's Interface

The user's interface for Construction Workforce Points assignation is completed, a bit rough on the edges yet but usable. It allows the 2 methods:  colonists assignation w/ possible tools, and vehicles assignation.

Here's a screenshot:

The interface has nothing fancy but for now it suffice and do the job.

Infrastructures assembling and building will follow + some user's interface again for assemble/build an infrastructure.
Finally the production system will be implemented after that.