Merge pull request #15 from tspascoal/master

Improve vso assign and fixes
Support for work item API 1.0-preview.2
 Add support for TFVC source control
 Add vso checkins command
 Add support for CMMI process template
Support for work item API 1.0-preview.2
 Add support for TFVC source control
 Add vso checkins command
 Add support for CMMI process template