Update release process

- Create release
- Upload package
- Update Website button
Update the README.md during the release process
Chocolatey: no need to specify the download url...
Associate tfs workitems with pattern #Workitem_id ( github style )

If Microsoft is doing it with TFS2013 and Git, why can't we do it!?!
cleaning/refactoring tests on checkin options (nothing scary)
Use GitTfsTasks
Fix writing download_button.html
Merge pull request #481 from pmiossec/update_release_process

Update release process
export workitems with github/TFS '#' format to better support import in TFS(Git)
Merge pull request #483 from pmiossec/associate_workitem_github_style

Associate tfs workitems with pattern #Workitem_id ( github style )