Make vim-mode keymaps more specific to override certain OS mappings

fixes #263
Add @bhuga's changes to changelog
Merge pull request #296 from mcnicholls/win32-keymapping-fix

Make vim-mode keymaps more specific to override certain OS mappings
Add @mcnicholls fix to changelog
Add "space" keybinding which uses the "move-right" motion
:bug: fix visual characterwise + `G` motion
:bug: fix visual characterwise + `G` motion