Removed TJMTwoDimensionalArray from Podfile since it's brought in as a dependency of TJMGameBoard.
Revert "Removed TJMTwoDimensionalArray from Podfile since it's brought in as a dependency of TJMGameBoard."

This reverts commit 5f371232209a0efe45e936c7ec1036708810bd34.
Fixed warning about NSUInteger cast.
Added podspec.