make compilewill give you a byte-compiled version)
- Load file and run
You can use
M-x customize-group sackspace to change the keybindings of
Backspace : Delete char backwards or delete back Tabstop 
C-Backspace : Delete word backwards (you can customize delete function) 
Alt-Backspace : Delete char backwards 
Shift-Backspace : Delete all whitespace till non-whitespace char is found.
 Takes a numeric argument. You can specify how often it will be executed.
Issues with other Packages
sack/install-in-viper will take care that
nil, but you can circumvent that behavior via
note that if you do so it is very likely that you face unwanted behavior (like
facading the bindings in Ido).