Try to avoid running bundler in tests on Travis

.travis.yml

@@ -7,6 +7,8 @@ rvm:
   
 script: "bundle exec rake test"
 
+env: TRAVIS=true
+
 matrix:
   allow_failures:
     - rvm: jruby-19mode

middleman-core/lib/middleman-core/templates.rb

@@ -57,7 +57,7 @@ module Middleman::Templates
       
       inside(location) do
         ::Middleman::Cli::Bundle.new.invoke(:bundle)
-      end
+      end unless ENV["TRAVIS"]
     end
 
     # Output a .gitignore file