Replaced int's with NSInteger's

Stop warnings when building for 64bit.
May be unnecessary ones as well, however made it consistant.
Merge pull request #14 from chadedrupt/nsintegers

Replaced int's with NSInteger's
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Merge pull request #15 from vincentjames501/issue#5

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Updating podspec and tag to 2.0.3
Merge pull request #16 from vincentjames501/master

Updating podspec and tag to 2.0.3
Sematic version tagging
Updated pod spec