-Modified the to-do list.
-Added one more enemy and changed the positions of other enemies.
-Added list of commands to be used as a look up table.
-Replaced the way objects were being updated. Modify() gets called now instead of update, this way we can take input from the ANN.
-Enemies move the frogger way now.
-Implemented notify function for player (should take input from ANN).
-Implemented update function to take action when there is an input from the ANN.
Fixed update and notify functions to work with Boolean values instead.

-Deleted previous code that modified the update function.
-Deleted COMMANDS dictionary.
-Added turn_left, turn_right, and move_forward to Player class.
Merge pull request #1 from ReanoD/master

Implementations for player and enemies