vimkeybindings Improved troch Tartaruskelvin

Supported Commands
* j : scroll down
* k : scroll up
* gg : go to the top of the page
* G (shift-g) : go to the bottom of the page
* l : go to the next tab
* h : go to the previous tab

Commands can be repeated as in vim. Example: 50j will scroll down 50 lines.