Ditching xbindkeys for sxhkd

-   Transforming the xbindkeysrc file to a sxhkd configuration file.
    Profiting from the bash-like syntax (i.e. Removing the weird quotation marks)
-   Xinitrc: Replacing the xbindkeys entry with sxhkd
Adding the dwb userscripts to the repo
Removing totem
Removing sublime text
Removing xfce4
Fixing git-prompt which shows if a repo is dirty

I had set the quotation marks wrong: Now the theme shows the status
of the current repo (dirty/clean) correctly
Ncmpcpp is now looking nice with hemisu colorscheme
Removing the dim-function

The dim function is useless because I hadn't installed the sips
program. Also with imagemagick (identify) it is also very comfortable to
look for the dimensions of images, so I have no need for the dim
function.