title: Strange errors when doing bundle install with Cramp
body: <p>Here is a <code>Gemfile</code> of default Rails application.</p>
  
  <pre><code>source 'https://rubygems.org'
  gem 'rails', '4.1.0'
  gem 'sqlite3'
  gem 'sass-rails', '~&gt; 4.0.3'
  gem 'uglifier', '&gt;= 1.3.0'
  gem 'coffee-rails', '~&gt; 4.0.0'
  gem 'jquery-rails'
  gem 'turbolinks'
  gem 'jbuilder', '~&gt; 2.0'
  gem 'sdoc', '~&gt; 0.4.0',          group: :doc
  gem 'tzinfo-data', platforms: [:mingw, :mswin]
  </code></pre>
  
  <p>Whei I run <code>bundle install</code> everything is intalled fine.</p>
  
  <p>Now do</p>
  
  <pre><code>gem install cramp
  </code></pre>
  
  <p>It is being installed also without any troubles.</p>
  
  <p>And finally include</p>
  
  <pre><code>gem 'cramp'
  </code></pre>
  
  <p>into <code>Gemfile</code>. From now on we have following results:</p>
  
  <p>bundle install</p>
  
  <pre><code>DL is deprecated, please use Fiddle
  Fetching gem metadata from https://rubygems.org/..........
  Fetching additional metadata from https://rubygems.org/..
  Resolving dependencies...
  Bundler could not find compatible versions for gem "activesupport":
    In Gemfile:
      cramp (&gt;= 0) x86-mingw32 depends on
        activesupport (= 3.0.pre) x86-mingw32
  
      rails (= 4.1.0) x86-mingw32 depends on
        railties (= 4.1.0) x86-mingw32 depends on
          activesupport (4.1.0)
  </code></pre>
  
  <p>bundle update</p>
  
  <pre><code>DL is deprecated, please use Fiddle
  Fetching gem metadata from https://rubygems.org/..........
  Fetching additional metadata from https://rubygems.org/..
  Resolving dependencies...
  Bundler could not find compatible versions for gem "thor":
    In Gemfile:
      cramp (&gt;= 0) x86-mingw32 depends on
        thor (~&gt; 0.14.6) x86-mingw32
  
      rails (= 4.1.0) x86-mingw32 depends on
        railties (= 4.1.0) x86-mingw32 depends on
          thor (0.19.1)
  
  Bundler could not find compatible versions for gem "activesupport":
    In Gemfile:
      cramp (&gt;= 0) x86-mingw32 depends on
        activesupport (= 3.0.pre) x86-mingw32
  
      rails (= 4.1.0) x86-mingw32 depends on
        activesupport (4.1.0)
  </code></pre>
  
  <p>I did not specify a Cramp version so there must be used the same version as I installed with <code>gem install cramp</code>. But why <code>gem install</code> worked without any problems and bundle install has found some unresolved dependencies?</p>
  
  <p>I am trying to do all this on Windows 7 + Ruby 2.0.0p451 + Rails 4.1.0
  and on Ubuntu 12.04 LTS with the same Ruby and Rails versions.</p>
  
  <p>What I tried: I ran <code>bundle install</code> and <code>bundle update</code> on default <code>Gemfile</code>, then added <code>gem 'cramp'</code>, ran <code>bundle install</code> and <code>bundle update</code> again. Results you can see few lines above.</p>