Rakefile in rays-0.1.45 vs Rakefile in rays-0.1.46

@@ -33,9 +33,10 @@
 use_external_library 'https://github.com/andrewwillmott/splines-lib',
   commit:   '11e7240d57b0d22871aec3308186a5fcf915ba77',
   excludes: 'Test\.cpp'
 
 default_tasks :ext
+use_bundler
 build_native_library
 build_ruby_extension
 test_ruby_extension
 generate_documents
 build_ruby_gem