Worked on the issue 16, trying to switch the several plays from the play_controller class to a single pointer to a abstract play class.
I dont really know why it is not working. The code is compiling, but when we launch the simulation, an error related to the Strategy_node appears. Still trying to find out what it means.
Merge branch 'master' of https://github.com/unball/ieee-very-small into iss16
Forgot to verify if the play was null in updatePlay() in the PlayController class
minor changes to play_controller.cpp. still not working
Finally fixed issue16. Fixes 16
Merge branch 'iss16'

Conflicts:
	software/src/unball/src/unball/strategy/strategy.cpp