[thoughtbot#13] Apply template to Ruby trail

* Add Ruby Koans
* Add sections of the Pickaxe

trails/git.md

@@ -35,7 +35,7 @@ You know everyday git when you can:
 * Merge a branch into master.
 * Push to origin.
 
-You are an advanced git user when you can:
+You know advanced git when you can:
 
 * Cherry pick commits.
 * Reorder commits.

trails/ruby.md

@@ -1,4 +1,36 @@
 Ruby
 ====
 
-* [Learn Ruby The Hard Way](http://ruby.learncodethehardway.org/book/).
+Critical learning
+-----------------
+
+* Read [Learn Ruby The Hard Way](http://ruby.learncodethehardway.org/book/).
+* Complete the [Ruby Koans](http://rubykoans.com).
+* Read these sections of
+  [The Pickaxe](http://pragprog.com/book/ruby/programming-ruby):
+
+```shell
+Chapter 23, "Duck Typing"
+Chapter 24, "Classes and Objects"
+```
+
+Validation
+----------
+
+You know everyday Ruby when you can:
+
+* Use irb to test your ideas.
+* Run programs.
+* Print values.
+* Define a method.
+* Invoke a method.
+* Compare objects.
+* Define a class.
+* Instantiate an object.
+* Iterate over collections.
+
+Ongoing reference
+-----------------
+
+* Ruby Library reference in
+  [The Pickaxe](http://www.amazon.com/Programming-Ruby-Pragmatic-Programmers-Edition/dp/0974514055)

trails/vim.md

@@ -42,7 +42,7 @@ You know everyday vim when you can:
 * Modify your environment via dotfiles.
 * Install plugins.
 
-You are an advanced vim user when you can:
+You know advanced vim when you can:
 
 * Identify vim's use of every letter on the keyboard (uppercase and lowercase).