Add Xcode suggested GCC_WARN_64_TO_32_BIT_CONVERSION warning to Demo project
Merge pull request #199 from rivera-ernesto/add_suggested_warning_check

Add Xcode suggested GCC_WARN_64_TO_32_BIT_CONVERSION warning to Demo project
Comment cleanup / fix. #201
Fixed spacing.
Added missing release calls in non-arc mode. Fixes #206
Bumped the deployment target for Xcode 6 compatibility.
Merging changes from the original repository