Merge pull request #4 from Deitronix/master

Get version with computer move with jumps
Merge pull request #5 from Deitronix/master

Version with basis of double jump
Merge branch 'Deitronix-master'
User Input Validation for White Pieces

The user input gets validated now, so the user can't
move the other player's pieces or jump over their own pieces iff the player is white.
Black will soon follow.
The users pieces have validation to make sure they cannot jump thier own pieces
for both black and white.
User Double Jumps

For now, the way the user enters a double jump is by entering three separate board locations.
These are validated and then executed.  There is now a function called human_double that takes in 3 coordinates
and a function called check_jump which ensures the user is completing two separate valid jumps.