Use Rails 3.1.

Some tests are failing. Trying to fix it.

Gemfile

@@ -1,6 +1,6 @@
 source 'http://rubygems.org'
 
-gem "rails", ">= 3.0.3"
+gem "rails", ">= 3.1.0"
 
 group :development do
   gem "sqlite3-ruby"

Gemfile.lock

@@ -1,66 +1,76 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    abstract (1.0.0)
-    actionmailer (3.0.4)
-      actionpack (= 3.0.4)
-      mail (~> 2.2.15)
-    actionpack (3.0.4)
-      activemodel (= 3.0.4)
-      activesupport (= 3.0.4)
-      builder (~> 2.1.2)
-      erubis (~> 2.6.6)
-      i18n (~> 0.4)
-      rack (~> 1.2.1)
-      rack-mount (~> 0.6.13)
-      rack-test (~> 0.5.7)
-      tzinfo (~> 0.3.23)
-    activemodel (3.0.4)
-      activesupport (= 3.0.4)
-      builder (~> 2.1.2)
-      i18n (~> 0.4)
-    activerecord (3.0.4)
-      activemodel (= 3.0.4)
-      activesupport (= 3.0.4)
-      arel (~> 2.0.2)
-      tzinfo (~> 0.3.23)
-    activeresource (3.0.4)
-      activemodel (= 3.0.4)
-      activesupport (= 3.0.4)
-    activesupport (3.0.4)
-    arel (2.0.8)
-    builder (2.1.2)
-    diff-lcs (1.1.2)
-    erubis (2.6.6)
-      abstract (>= 1.0.0)
-    i18n (0.5.0)
-    mail (2.2.15)
-      activesupport (>= 2.3.6)
+    actionmailer (3.1.0)
+      actionpack (= 3.1.0)
+      mail (~> 2.3.0)
+    actionpack (3.1.0)
+      activemodel (= 3.1.0)
+      activesupport (= 3.1.0)
+      builder (~> 3.0.0)
+      erubis (~> 2.7.0)
+      i18n (~> 0.6)
+      rack (~> 1.3.2)
+      rack-cache (~> 1.0.3)
+      rack-mount (~> 0.8.2)
+      rack-test (~> 0.6.1)
+      sprockets (~> 2.0.0)
+    activemodel (3.1.0)
+      activesupport (= 3.1.0)
+      bcrypt-ruby (~> 3.0.0)
+      builder (~> 3.0.0)
+      i18n (~> 0.6)
+    activerecord (3.1.0)
+      activemodel (= 3.1.0)
+      activesupport (= 3.1.0)
+      arel (~> 2.2.1)
+      tzinfo (~> 0.3.29)
+    activeresource (3.1.0)
+      activemodel (= 3.1.0)
+      activesupport (= 3.1.0)
+    activesupport (3.1.0)
+      multi_json (~> 1.0)
+    arel (2.2.1)
+    bcrypt-ruby (3.0.0)
+    builder (3.0.0)
+    diff-lcs (1.1.3)
+    erubis (2.7.0)
+    hike (1.2.1)
+    i18n (0.6.0)
+    mail (2.3.0)
       i18n (>= 0.4.0)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.16)
-    polyglot (0.3.1)
-    rack (1.2.1)
-    rack-mount (0.6.13)
+    multi_json (1.0.3)
+    polyglot (0.3.2)
+    rack (1.3.2)
+    rack-cache (1.0.3)
+      rack (>= 0.4)
+    rack-mount (0.8.3)
       rack (>= 1.0.0)
-    rack-test (0.5.7)
+    rack-ssl (1.3.2)
+      rack
+    rack-test (0.6.1)
       rack (>= 1.0)
-    rails (3.0.4)
-      actionmailer (= 3.0.4)
-      actionpack (= 3.0.4)
-      activerecord (= 3.0.4)
-      activeresource (= 3.0.4)
-      activesupport (= 3.0.4)
+    rails (3.1.0)
+      actionmailer (= 3.1.0)
+      actionpack (= 3.1.0)
+      activerecord (= 3.1.0)
+      activeresource (= 3.1.0)
+      activesupport (= 3.1.0)
       bundler (~> 1.0)
-      railties (= 3.0.4)
-    railties (3.0.4)
-      actionpack (= 3.0.4)
-      activesupport (= 3.0.4)
+      railties (= 3.1.0)
+    railties (3.1.0)
+      actionpack (= 3.1.0)
+      activesupport (= 3.1.0)
+      rack-ssl (~> 1.3.2)
       rake (>= 0.8.7)
-      thor (~> 0.14.4)
-    rake (0.8.7)
-    rcov (0.9.9)
+      rdoc (~> 3.4)
+      thor (~> 0.14.6)
+    rake (0.9.2)
+    rcov (0.9.10)
+    rdoc (3.9.4)
     rspec (2.4.0)
       rspec-core (~> 2.4.0)
       rspec-expectations (~> 2.4.0)
@@ -74,18 +84,26 @@ GEM
       activesupport (~> 3.0)
       railties (~> 3.0)
       rspec (~> 2.4.0)
-    sqlite3-ruby (1.3.2)
+    sprockets (2.0.0)
+      hike (~> 1.2)
+      rack (~> 1.0)
+      tilt (!= 1.3.0, ~> 1.1)
+    sqlite3 (1.3.4)
+    sqlite3-ruby (1.3.3)
+      sqlite3 (>= 1.3.3)
     thor (0.14.6)
-    treetop (1.4.9)
+    tilt (1.3.3)
+    treetop (1.4.10)
+      polyglot
       polyglot (>= 0.3.1)
-    tzinfo (0.3.24)
+    tzinfo (0.3.29)
     yard (0.7.2)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  rails (>= 3.0.3)
+  rails (>= 3.1.0)
   rcov
   rspec-rails (~> 2.4.0)
   sqlite3-ruby