Initializing mancala hole with zero seeds. Preventing negative index on canCapture and isPossibleMove.

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Your branch is ahead of 'origin/master' by 1 commit.
#
# Changes to be committed:
#   (use "git reset HEAD^1 <file>..." to unstage)
#
#	modified:   Board.hs
#	modified:   Board_Test.hs
#	modified:   Main.hs
#	modified:   Rules.hs
#	modified:   Rules_Test.hs
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#	LICENSE
#	Setup.hs
#	dist/
#	mancala.cabal