Update gems but stay on rails 3.1 for now

Gemfile

@@ -1,29 +1,23 @@
 source 'http://rubygems.org'
-gem 'rails','>=3.1.0'
-gem 'yajl-ruby', :require => 'yajl'
+gem 'rails', '>=3.1.0', '<3.2.0'
 
 gem 'bson_ext'
 gem 'carrierwave'
 gem 'carrierwave-mongoid', :require => 'carrierwave/mongoid'
 gem 'ckeditor'
 gem 'devise'
+gem 'exception_notification' # Send error trace
+gem 'execjs'
+gem 'jquery-rails'
 gem 'mini_magick'
+gem 'mongoid'
+gem 'radius'
+gem 'rake'
+gem 'ruby-debug19'
 gem 'rubyzip'
 gem 'sinatra'
-gem 'execjs'
-gem 'mongoid'
-
-gem 'rake','0.8.7'
-gem 'jquery-rails'
-
 gem 'sprockets'
-
-gem 'radius'
-
-gem 'exception_notification'
-
-# For linux
-# gem 'therubyracer'
+# gem 'therubyracer' # For linux
 
 # Gems used only for assets and not required
 # in production environments by default.
@@ -33,9 +27,6 @@ group :assets do
   gem 'uglifier'
 end
 
-# To use debugger (ruby-debug for Ruby 1.8.7+, ruby-debug19 for Ruby 1.9.2+)
-# gem 'ruby-debug'
- gem 'ruby-debug19'
 
 group :test, :development do
   gem 'spork'
@@ -44,7 +35,7 @@ group :test, :development do
   gem "rspec-rails", "~> 2.0"
   gem "factory_girl_rails"
   gem "shoulda-matchers"
-  gem "rcov"
+  gem "simplecov"
   gem "delorean"
   gem "watchr"
 	gem "spork"