Visual mode is now implemented with commands h, j, k, l, w, G, and y.
Nothing for visual block mode has been added yet, just line and char.

Command j was off by one, causing the first selected line to be
unselected and then reselected everytime there was a blank line.
Also fixes visual line selection from inverting selection when at the
end of dcument.

…sual-vim

…sual-vim

Command k would unselect and reselect the first line when at the first
line.
Command G did not move selection when attached to a number prefix.
Command gg did not have visual mode implemented.