Broader Ruby support.

Author: dblock

.travis.yml

@@ -1,5 +1,14 @@
 rvm:
   - 1.9.3
   - 2.0.0
-  - 2.1.2
+  - 2.1
+  - 2.2
+  - rbx-2.2.10
+  - jruby-19mode
+  - ruby-head
+  - jruby-head
 
+matrix:
+  allow_failures:
+    - rvm: ruby-head
+    - rvm: jruby-head