Merge pull request #7 from OfficeDev/dev

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Merge pull request #8 from OfficeDev/dev

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Merge pull request #9 from OfficeDev/dev

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Moved context creation logic to a seperate function
made CreateContext private
Added CreateList test
fixed typo in function description
Added FileFolderExtensionTests.cs class and tests for CheckIn and ChekOut files
Merged PR 149 + conflict resolution