add dev dependencies: jeweler, sdoc-helpers, rdiscount

Gemfile

@@ -2,4 +2,7 @@ source :rubygems
 
 group :development do
   gem 'rspec'
+  gem 'jeweler'
+  gem 'sdoc-helpers'
+  gem 'rdiscount'
 end

Gemfile.lock

@@ -2,6 +2,15 @@ GEM
   remote: http://rubygems.org/
   specs:
     diff-lcs (1.1.2)
+    git (1.2.5)
+    jeweler (1.6.0)
+      bundler (~> 1.0.0)
+      git (>= 1.2.5)
+      rake
+    json (1.5.1)
+    rake (0.8.7)
+    rdiscount (1.6.8)
+    rdoc (2.4.3)
     rspec (2.5.0)
       rspec-core (~> 2.5.0)
       rspec-expectations (~> 2.5.0)
@@ -10,9 +19,17 @@ GEM
     rspec-expectations (2.5.0)
       diff-lcs (~> 1.1.2)
     rspec-mocks (2.5.0)
+    sdoc (0.2.20)
+      json (>= 1.1.3)
+      rdoc (= 2.4.3)
+    sdoc-helpers (0.1.4)
+      sdoc (~> 0.2)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  jeweler
+  rdiscount
   rspec
+  sdoc-helpers