Fixed "not found command" on xdebug_on 

Adding homebin to /usr/bin in order to have commands available all the time. This way `xdebug_on` works from any directory and db_backup executes correctly, because dunno about others, but i never was able to get these commands to work with a fresh box.

Also, before coyping these guys, i make sure that line endings are set to `\r` in order to make sure that issues like #307 doesn't pop.