Make Colemak layout more ergonomic

layers/+intl/keyboard-layout/README.org

@@ -197,12 +197,14 @@ the [[https://colemak.com/][Colemak website]].
 
 [[file:img/colemak-layout.png]]
 
-This layer offers three flavors of Colemak bindings:
+This layer offers four flavors of Colemak bindings:
 - =colemak-hnei= remaps ~HJKL~ to ~HNEI~, keeping the same key location; useful
   for people used to the ~HJKL~ scheme on a Qwerty keyboard.
-- =colemak-neio= remaps ~HJKL~ to ~NEIO~, shifted one key to the right for
-  easier access.
-- =colemak-jkhl= remaps ~HJKL~ to ~JKHL~, permuting the direction of the keys
+- =colemak-neio-literal= remaps ~HJKL~ to ~NEIO~, shifted one key to the right for
+  easier access. It has easier access to new line mode (~o~).
+- =colemak-neio-inverted= remaps ~HJKL~ to ~NEIO~, shifted one key to the right for
+  easier access. It has easier access to insert mode (~i~) (~L~, instead of ~K~).
+- =colemak-jkhl= remaps ~HJKL~ to ~JKHL~, switching the direction of the keys
   without disturbing any other binding.
 
 *Note*: for technical reasons (see [[https://github.com/syl20bnr/spacemacs/pull/7178#issuecomment-249360301][GH-7178]]), when using =colemak-jkhl=, the

layers/+intl/keyboard-layout/config.el

@@ -15,8 +15,8 @@
 
 (defvar kl-layout 'dvorak
   "The keyboard-layout to use. Possible values are `bepo', `dvp',
-`dvorak', `workman', `neo', `colemak-neio', `colemak-hnei' and
-`colemak-jkhl'.")
+`dvorak', `workman', `neo', `colemak-neio-literal', `colemak-neio-inverted',
+ `colemak-hnei' and `colemak-jkhl'.")
 
 (defvar kl-enabled-configurations nil
   "If non nil, `keyboard-layout' will enable configurations only
@@ -83,7 +83,7 @@ case.")
         ("j" . "n")
         ("h" . "r")
         ("k" . "t")))
-    (colemak-neio
+    (colemak-neio-literal
      . (("n" . "h")
         ("e" . "j")
         ("i" . "k")
@@ -91,8 +91,18 @@ case.")
         ;;
         ("h" . "n")
         ("j" . "e")
-        ("k" . "i")
-        ("l" . "o")))
+        ("k" . "i")   ;;
+        ("l" . "o"))) ;; easier access to "New Line Mode"
+    (colemak-neio-inverted
+     . (("n" . "h")
+        ("e" . "j")
+        ("i" . "k")
+        ("o" . "l")
+        ;;
+        ("h" . "n")
+        ("j" . "e")
+        ("l" . "i")   ;; easier access to "Insert Mode"
+        ("k" . "o"))) ;;
     (colemak-hnei
      . (("h" . "h")
         ("n" . "j")