Bug fixes from scenario tests

New Features

• Functional tests added
• Increased code coverage
• Added Outlook models that have been added to the v1.0 endpoint

Bug Fixes

• Fixed inheritance structure of models
• Switched to using nextLink instead of skipToken to navigate collections
• Several improvements to stream handling
• Replaced flattenDictionary with jsonSerialize extension in models
• Fixed collision of 'value' when model has a field named 'value'
• Removed duplicate getProperties() calls