Update version number to 1.5.1
Restore version name in documentation
Version 1.4.rc1 https://github.com/cms-dev/cms/wiki/CMS-1.4.rc1-RELEASE-NOTES
Version 1.4.rc0
Version 1.3.2 https://github.com/cms-dev/cms/wiki/CMS-1.3.2-RELEASE-NOTES
Version 1.3.1 https://github.com/cms-dev/cms/wiki/CMS-1.3.1-RELEASE-NOTES
Version 1.3.0 https://github.com/cms-dev/cms/wiki/CMS-1.3.0-RELEASE-NOTES
Version 1.3.rc0 https://github.com/cms-dev/cms/wiki/CMS-1.3.rc0-RELEASE-NOTES
Version 1.2.0 https://github.com/cms-dev/cms/wiki/CMS-1.2.0-RELEASE-NOTES
Version 1.1.0 https://github.com/cms-dev/cms/wiki/CMS-1.1.0-RELEASE-NOTES