Added GetMonthName Method.
Added IsMobileBrowser Method.
Added TruncateAtWord Method.
Added GetYouTubeId Method.
Made IsMobileBrowser static
Merge remote-tracking branch 'upstream/master'

Conflicts:
	ExtensionMethods/YouTube.cs
Removed GetYouTubeId Method from YouTube.cs as abjerner wrote it already.
Added InvertCase method to String.cs. Removed GetYouTubeId method as it is duplicate and minor modifiction in some methods.
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Merge pull request #11 from Ajmalcpp/master

Added some helpful methods.