init.el: don't override C-j, use C-x j for ace-jump
init.el: attempt to filter some packages from MELPA

Some just seem to break too often for their own good.
init.el: un-break whitespace-mode

The default set meant nothing.
init.el: delete all the theme setting stuff

It needs doing again in a cleaner way, especially with the Pixel
init.el: moar bindings for multilpe-cursors