Use the /d option to change into the %HOME% directory
In case the %HOME% directory is not located on the same drive
as msysgit, git-cmd.bat will not open at the correct location
without that option.
Merge pull request #146 from ferstl/change-homedrive

Change to the home drive before changing to the home directory
Installer: Equalize code formatting for multi-line function calls

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
Installer: Use SuppressibleMsgBox to support silent installations (fixes #140)

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>