update travis to add versions of ruby/rails

Author: JonRowe

.travis.yml

@@ -8,18 +8,23 @@ rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
-  - 2.0.0
-  - 2.1.0
+  - 2.0
+  - 2.1
+  - 2.2
 env:
   - RAILS_VERSION=master
+  - RAILS_VERSION=4-2-stable
+  - RAILS_VERSION=4-1-stable
   - RAILS_VERSION=4-0-stable
-  - RAILS_VERSION=4.0.2
   - RAILS_VERSION=3-2-stable
   - RAILS_VERSION=3.2.16
   - RAILS_VERSION=3.1.12
   - RAILS_VERSION=3.0.20
 matrix:
   exclude:
+    # MRI 2.2 is not supported on a few versions
+    - rvm: 2.2
+      env: RAILS_VERSION='~> 3.1.12'
     # 3.0.x is not supported on MRI 2.0.0
     - rvm: 2.0.0
       env: RAILS_VERSION=3.0.20
@@ -31,8 +36,16 @@ matrix:
       env: RAILS_VERSION=master
     - rvm: 1.9.2
       env: RAILS_VERSION=master
+    - rvm: 1.8.7
+      env: RAILS_VERSION=4-2-stable
+    - rvm: 1.8.7
+      env: RAILS_VERSION=4-1-stable
     - rvm: 1.8.7
       env: RAILS_VERSION=4-0-stable
+    - rvm: 1.9.2
+      env: RAILS_VERSION=4-2-stable
+    - rvm: 1.9.2
+      env: RAILS_VERSION=4-1-stable
     - rvm: 1.9.2
       env: RAILS_VERSION=4-0-stable
     - rvm: 1.8.7