Relax bundler dep until 1.3.0 is actually released.

Revert "Bump bundler dep to 1.3.0.pre.4+ to introduce 'bundle binstubs <gem>'"

This reverts commit e00b8ecf1a.

Revert "Use bundler --pre for travis builds"

This reverts commit 4d240ec20a.

.travis.yml

@@ -1,6 +1,6 @@
 script: 'ci/travis.rb'
 before_install:
-  - gem install bundler --pre
+  - gem install bundler
 rvm:
   - 1.9.3
   - 2.0.0

rails.gemspec

@@ -26,6 +26,6 @@ Gem::Specification.new do |s|
   s.add_dependency 'actionmailer',  version
   s.add_dependency 'railties',      version
 
-  s.add_dependency 'bundler',         '>= 1.3.0.pre.4', '< 2.0'
+  s.add_dependency 'bundler',         '>= 1.2.2', '< 2.0'
   s.add_dependency 'sprockets-rails', '~> 2.0.0.rc1'
 end