Refactor menu/file structure

This standardizes capitalization in the menu and categorizes things into
more distinct categories that I hope are more helpful.

Quite frankly we could use a web designer to give this kind of thing a
once over, I'm a web developer :).

Author: Christopher Carpenter

_data/nav.yml

@@ -1,10 +1,9 @@
 - title: "Home"
   href: "/"
 
-- title: "quicklinks"
+- title: "Quicklinks"
   href: "/quicklinks.html"
 
-
 - title: "Initial"
   href: "/initial"
   subcategories:
@@ -17,38 +16,40 @@
     - subtitle: "ABCs"
       subhref: "/abcs.html"
 
-- title: "examples"
+- title: "IDE"
+  href: "/ide"
+  subcategories:
+    - subtitle: "Summary"
+      subhref: "/summary.html"
+    - subtitle: "Emacs"
+      subhref: "/emacs-setup.html"
+    - subtitle: "SLIME"
+      subhref: "/slime-setup.html"
+
+- title: "Libraries"
+  href: "/quicklisp.html"
+
+- title: "Examples"
   href: "/examples"
   subcategories:
     - subtitle: "Snippets"
       subhref: "/snippets.html"
-    - subtitle: "trotter"
+    - subtitle: "Trotter"
       subhref: "/trotter.html"
 
-- title: "env"
-  href: "/env"
+- title: "Implementations"
+  href: "/implementations"
   subcategories:
-    - subtitle: "IDE"
-      subhref: "/ide.html"
-    - subtitle: "Quicklisp"
-      subhref: "/quicklisp.html"
+    - subtitle: "Summary"
+      subhref: "/summary.html"
     - subtitle: "CUSP"
       subhref: "/cusp-setup.html"
-    - subtitle: "emacs"
-      subhref: "/emacs-setup.html"
-    - subtitle: "SLIME"
-      subhref: "/slime-setup.html"
-
-#- title: "Systems"
-#  href: "/env"
-#  subcategories:
     - subtitle: "Clozure CL"
       subhref: "/ccl-setup.html"
     - subtitle: "SBCL"
       subhref: "/sbcl-setup.html"
     - subtitle: "LispWorks CL"
       subhref: "/lispworks-setup.html"
-    - subtitle: "setup"
-      subhref: "/lisp-system.html"
+
 - title: "Who?"
   href: "/about/"