Update gems and use HTTPS to get them.

docs/Gemfile

@@ -1,5 +1,6 @@
-source :rubygems
+source "https://rubygems.org"
 
+gem "rake"
 gem "bonsai"
 gem "maruku"
 gem "ronn"

docs/Gemfile.lock

@@ -1,11 +1,15 @@
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
-    activesupport (3.2.9)
+    POpen4 (0.1.4)
+      Platform (>= 0.4.0)
+      open4
+    Platform (0.4.0)
+    activesupport (3.2.12)
       i18n (~> 0.6)
       multi_json (~> 1.0)
-    addressable (2.3.2)
-    bonsai (1.4.7)
+    addressable (2.3.4)
+    bonsai (1.4.8)
       activesupport (>= 3.0.3)
       builder (>= 3.0.0)
       i18n (>= 0.5.0)
@@ -17,32 +21,37 @@ GEM
       sinatra (>= 1.0)
       tilt (>= 1.3)
       watch (>= 0.1.0)
-    builder (3.1.4)
+      yui-compressor
+    builder (3.2.0)
     hpricot (0.8.6)
-    i18n (0.6.1)
-    launchy (2.1.2)
+    i18n (0.6.4)
+    launchy (2.3.0)
       addressable (~> 2.3)
-    liquid (2.4.1)
+    liquid (2.5.0)
     maruku (0.6.1)
       syntax (>= 1.0.0)
-    multi_json (1.5.0)
+    multi_json (1.7.3)
     mustache (0.99.4)
-    rack (1.4.1)
-    rack-protection (1.3.2)
+    open4 (1.3.0)
+    rack (1.5.2)
+    rack-protection (1.5.0)
       rack
-    rdiscount (1.6.8)
+    rake (10.0.3)
+    rdiscount (2.0.7.2)
     ronn (0.7.3)
       hpricot (>= 0.8.2)
       mustache (>= 0.7.0)
       rdiscount (>= 1.5.8)
-    sass (3.2.3)
-    sinatra (1.3.3)
-      rack (~> 1.3, >= 1.3.6)
-      rack-protection (~> 1.2)
-      tilt (~> 1.3, >= 1.3.3)
+    sass (3.2.8)
+    sinatra (1.4.2)
+      rack (~> 1.5, >= 1.5.2)
+      rack-protection (~> 1.4)
+      tilt (~> 1.3, >= 1.3.4)
     syntax (1.0.0)
-    tilt (1.3.3)
+    tilt (1.4.0)
     watch (0.1.0)
+    yui-compressor (0.9.6)
+      POpen4 (>= 0.1.4)
 
 PLATFORMS
   ruby
@@ -50,4 +59,5 @@ PLATFORMS
 DEPENDENCIES
   bonsai
   maruku
+  rake
   ronn