Merge tag '1.5.1' into develop

Released v1.5.1.

Changelog available on the website.
Fix: make sure git hf update always returns to the right branch after an update
Update msysgit-install
update install.cmd
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update msysgit-install.cmd
Merge pull request #1 from seldoff/patch-1

Update msysgit-install.cmd
Update README.md
Fix remote tracking
Update version
Merge branch 'release/1.5.2'