message: README updates (keyboard shortcuts)
diff: @@ -28,7 +28,7 @@ The following is an incomplete list of features that contour does or will suppor
  * [x] Font Ligatures Support (such as in Fira Code)
  * [x] GPU-accelerated rendering
  * [x] 256-color and Truecolor support
  -* [ ] Key binding customization
  +* [x] Key binding customization
  * [ ] History Search
  * [ ] Activity/Inactivity/Bell System Notification
  * [ ] Color Schemes
  @@ -115,6 +115,14 @@ colors: # Color scheme: Google Dark
  | <kbd>Control</kbd>+<kbd>Mouse Wheel Down</kbd> | Decreases font size |
  | <kbd>Alt</kbd>+<kbd>Mouse Wheel Up</kbd> | Increases background opacity |
  | <kbd>Alt</kbd>+<kbd>Mouse Wheel Down</kbd> | Decreases background opacity |
  +| <kbd>Mouse Wheel Up</kbd> | Scroll history up |
  +| <kbd>Mouse Wheel Down</kbd> | Scroll history down |
  +| <kbd>Shift</kbd>+<kbd>Mouse Wheel Up</kbd> | Scroll history up by half a page |
  +| <kbd>Shift</kbd>+<kbd>Mouse Wheel Down</kbd> | Scroll history down by half a page |
  +| <kbd>Shift</kbd>+<kbd>PageUp</kbd> | Scroll history up by half a page |
  +| <kbd>Shift</kbd>+<kbd>PageDown</kbd> | Scroll history down by half a page |
  +| <kbd>Control</kbd>+<kbd>Home</kbd> | Scroll history to top |
  +| <kbd>Control</kbd>+<kbd>End</kbd> | Scroll history to bottom |
  ## Installing from source
  