update travis config to get rbx working again

Author: elspethsoup

.travis.yml

@@ -9,24 +9,19 @@ rvm:
   - 1.9.2
   - 1.9.3
   - 2.0.0
+  - 2.1.0
   - jruby-18mode
   - jruby-19mode
-  - jruby-head
-  - rbx-18mode
-  - rbx-19mode
+  - rbx
 matrix:
   exclude:
     - rvm: 1.9.3
       gemfile: gemfiles/rails23.gemfile
     - rvm: 2.0.0
       gemfile: gemfiles/rails23.gemfile
-    - rvm: ruby-head
+    - rvm: 2.1.0
       gemfile: gemfiles/rails23.gemfile
     - rvm: jruby-19mode
       gemfile: gemfiles/rails23.gemfile
-    - rvm: jruby-head
+    - rvm: rbx
       gemfile: gemfiles/rails23.gemfile
-    - rvm: rbx-19mode
-      gemfile: gemfiles/rails23.gemfile
-  allow_failures:
-    - rvm: jruby-head

Gemfile

@@ -3,11 +3,12 @@ source "http://rubygems.org"
 gemspec
 
 group :tools do
-  gem "simplecov", :require => false
   gem "guard"
   gem "guard-rspec"
   gem "guard-bundler"
   gem "fuubar"
   gem "rb-fsevent"
   gem "ruby_gntp", :group => :darwin
 end
+
+gem 'rubysl', :platform => :rbx