Merge pull request #10 from OfficeDev/dev

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Fixed AddPermissionLevelToUserTest.  The test works now.
Merge pull request #11 from OfficeDev/dev

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extracted common code from Site.IsFeatureActive and Web.IsFeatureActive in seperate function.
used Assert.IsTrue instead of Assert.AreEqual
Extracted common code from Web.ProcessFeature and Site.ProcessFeature into ProcessFeatureInternal
Merge pull request #156 from vman/master

Refactoring, Fixed a test