Copied i3blocks scripts from orig dir

Some were modified from original but can't be bothered to check which.
'backlight' is custom. Changed both PC/laptop i3blocks config to
reference new i3blocks-scripts location.

system: Fixed keyboard repeat rate for PC/laptop.
Git: Added amending commit and forcing push aliases.
i3: Changed '$mod+F[1-3]' mappings to just 'F[1-3]'.

dotfiles/Xresources

@@ -4,7 +4,7 @@ URxvt.font: xft:hack:size=12
 URxvt*inheritPixmap: true
 URxvt*transparent: true
 ! URxvt*shading: 0 to 99 darkens, 101 to 200 lightens
-URxvt*shading: 30
+URxvt*shading: 40
 /* }}} transparency */
 
 URxvt.scrollBar: false