Add support for ipod touch

"Mozilla/5.0 (iPod touch; CPU iPhone OS 7_0_2 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A501 Safari/9537.53"

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Add tests for iPhone and iPod touch
Merge pull request #26 from startswithaj/master

Add support for iPod touch and add device tests for iPhone and iPod