Enhancement to uninstall bash/batch shortcuts, and a small fix to display info when creating bash shortcuts

When a Chocolatey-Uninstall is done, the bash and batch shortcuts will
now be removed using Remove-BinFile

I've also added a message in Generate-BinFile that the bash shortcut is
getting added, as this was missing.

I've also added a message to Chocolatey-Uninstall describing which
directory is removed on uninstall.