test the gem with mongoid-master

.travis.yml

@@ -4,3 +4,4 @@ rvm:
 gemfile:
   - Gemfile
   - gemfiles/mongoid-2.4.gemfile
+  - gemfiles/mongoid-master.gemfile

gemfiles/mongoid-master.gemfile

@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+gem 'mongoid', github: 'mongoid/mongoid'
+
+gemspec path: '../'

gemfiles/mongoid-master.gemfile.lock

@@ -0,0 +1,74 @@
+GIT
+  remote: git://github.com/mongoid/mongoid.git
+  revision: 4300efb3392d8e55bffa45990b30fca95035b32f
+  specs:
+    mongoid (3.1.0)
+      activemodel (~> 3.1)
+      moped (~> 1.2)
+      origin (~> 1.0)
+      tzinfo (~> 0.3.22)
+
+PATH
+  remote: /Users/tiago/Sites/github/localized_fields
+  specs:
+    localized_fields (0.2.0)
+      actionpack (~> 3.1)
+      mongoid (>= 2.4)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actionpack (3.2.8)
+      activemodel (= 3.2.8)
+      activesupport (= 3.2.8)
+      builder (~> 3.0.0)
+      erubis (~> 2.7.0)
+      journey (~> 1.0.4)
+      rack (~> 1.4.0)
+      rack-cache (~> 1.2)
+      rack-test (~> 0.6.1)
+      sprockets (~> 2.1.3)
+    activemodel (3.2.8)
+      activesupport (= 3.2.8)
+      builder (~> 3.0.0)
+    activesupport (3.2.8)
+      i18n (~> 0.6)
+      multi_json (~> 1.0)
+    builder (3.0.3)
+    diff-lcs (1.1.3)
+    erubis (2.7.0)
+    hike (1.2.1)
+    i18n (0.6.1)
+    journey (1.0.4)
+    moped (1.2.5)
+    multi_json (1.3.6)
+    origin (1.0.9)
+    rack (1.4.1)
+    rack-cache (1.2)
+      rack (>= 0.4)
+    rack-test (0.6.1)
+      rack (>= 1.0)
+    rake (0.9.2.2)
+    rspec (2.11.0)
+      rspec-core (~> 2.11.0)
+      rspec-expectations (~> 2.11.0)
+      rspec-mocks (~> 2.11.0)
+    rspec-core (2.11.1)
+    rspec-expectations (2.11.3)
+      diff-lcs (~> 1.1.3)
+    rspec-mocks (2.11.3)
+    sprockets (2.1.3)
+      hike (~> 1.2)
+      rack (~> 1.0)
+      tilt (~> 1.1, != 1.3.0)
+    tilt (1.3.3)
+    tzinfo (0.3.33)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  localized_fields!
+  mongoid!
+  rake (~> 0.9.2)
+  rspec (~> 2.8)