Evitar cópia ao construir actions, estava causando problemas.
Fix: minimax

- ignorar decisão de board vazio
- temporariamente desabilitar .isGameOver()
- não carregar a action da folha em Minimax::value, passar a atual
Cross compatible makefile.
Disable normal distribution for now.

Should enable back after implementing a move table.
Also there wasn't a way to get a random uniform position inside a
certain range for x and y, now there is.
Draw goals (as rectangles).
Improved gui controls (E, S, P keys).
These FIXMEs have already been fixed.
Fix: drawing Pass better: added line to receiver.
Fix depth count, do not count the root node.
A depth of 3 is now viable.
Merge branch 'master' of github.com:roboime/pfc-jan-bramigk