Added gist support. Importer will now convert the old gist link to a format jekyll expects
Added a model test for gist support
added a test for attachment link replacement
Moved test files into Unit and Integration Test folders
Added a test for FileDownloadServiceTests.cs and moved Mock types to a Mock folder
New mock and Test for the FileWriter, will pull in a proper Moq framework as my mocks types are not really making much sense at the moment
Added a test for the FileUtilityHelper
Added a test to cover the file rename of the JekyllPosrAttachment model type. I need to review the tests and validity of them