cleanup of some link organization

Author: afeld

categories/3d_modeling.md

@@ -11,4 +11,7 @@
 * https://github.com/reprap/huxley
 * https://github.com/gklyne/things/
 * https://github.com/eweinhoffer/Bike-Accessories
+
+## More
+
 * https://github.com/search?q=3d+stl&type=Repositories

categories/education.md

@@ -2,7 +2,7 @@
 
 ## Examples
 
-* https://github.com/afeld/advanced_js#readme
+* https://github.com/afeld/advanced_js
     * *Not anything revolutionary, but hoping it is a solid example of having all resources out in the open, well-organized and in one place.*
 * http://drtechniko.com/2012/04/09/how-to-train-your-robot/
     * *Not related to GitHub directly, but a great example of thinking outside the box for how to teach programming/logic.*
@@ -13,9 +13,7 @@
     * https://github.com/stuycs-softdev
     * https://github.com/stuycs-apcs-z
 * https://github.com/dypsilon/frontend-dev-bookmarks
-    * The URL summarizes the truth: a repo filled with bookmarks to frontend dev resources.
-* RIT Computer Science House's Constitution
-    * https://github.com/ComputerScienceHouse/Constitution
+* [RIT Computer Science House's Constitution](https://github.com/ComputerScienceHouse/Constitution)
 * https://github.com/fehler/curriculum
 * http://addyosmani.github.io/backbone-fundamentals/
 * https://github.com/SamyPesse/How-to-Make-a-Computer-Operating-System

categories/writing.md

@@ -6,7 +6,6 @@
 * https://github.com/manuelkiessling/NodeBeginnerBook
 * http://jj.github.io/hoborg/
 * https://github.com/WiredEnterprise/Lord-of-the-Files (via http://www.wired.com/wiredenterprise/2012/02/github-revisited/)
-* https://github.com/schacon/git-scribe
 * https://github.com/harvesthq/how-to-walkabout
 
 ## Guides
@@ -18,3 +17,7 @@
     * https://medium.com/what-i-learned-today/59a5be34bf98
 * http://technikhil.wordpress.com/2012/01/14/open-source-writing-using-git/
 * http://www.developer.com/open/10-ways-git-version-control-can-streamline-your-writing-projects.html
+
+## Tools
+
+* https://github.com/schacon/git-scribe