Rewrite the input system

[arthurmco]

The current input system does not sepparate inputs from actions. This can be bad if the user needs to switch the default keys to other keys of its liking

For example, separating the input of the letter 'Q` to the action of "Building a house"

Also, rewrite the player system to respond to the actions instead

[arthurmco]

Input system rewrite done in 1cb7581

I managed to maintain a good chunk of the code, specially the 3d picker code, so it is not exactly a rewrite, more like a refactor.

[arthurmco]

Now to the player system!

[arthurmco]

The input system is rewritten, and it works.

All actions that worked before, like moving and attacking, works now, as in 867102b.

Closing