Improve use_scroll_status_wclear comment
Handle binary files matches reported by git-grep
Add view-split-width setting for controlling vertical splits

Orthogonal with view-split-height, the new options allows to configure
how the terminal is split between the two views, defaulting to 50%.
Requested by Ralph Amissah.

This also fixes the positioning of the cursor to be on the last column
of the active view.
Bind K and J to previous and next

This means you do not have to move your fingers away from the keyboard
(to the arrow keys) to navigate the right an left columns in split main
& diff view, and you do it in a similar (vim familiar) way for both
split windows.

Suggestion and above explaination by Ralph Amissah.