title: no such file to load -- rails (MissingSourceFile)... say what?
body: <p>I'm having an obnoxious and weird problem while trying to include the ThinkingTank gem into my rails project. When I include <code>gem 'thinkingtank'</code> in my project's Gemfile I get the following error:</p>
  
  <pre>~/.rvm/gems/ree-1.8.7-2010.01/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require': no such file to load -- rails (MissingSourceFile)
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/thinkingtank-0.0.5/lib/thinkingtank.rb:1
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/bundler-1.0.7/lib/bundler/runtime.rb:64:in `require'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/bundler-1.0.7/lib/bundler/runtime.rb:64:in `require'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/bundler-1.0.7/lib/bundler/runtime.rb:62:in `each'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/bundler-1.0.7/lib/bundler/runtime.rb:62:in `require'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/bundler-1.0.7/lib/bundler/runtime.rb:51:in `each'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/bundler-1.0.7/lib/bundler/runtime.rb:51:in `require'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/bundler-1.0.7/lib/bundler.rb:112:in `require'
   from ~/git/myproject/config/boot.rb:121:in `load_environment'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/rails-2.3.5/lib/initializer.rb:137:in `process'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/rails-2.3.5/lib/initializer.rb:113:in `send'
   from ~/.rvm/gems/ree-1.8.7-2010.01/gems/rails-2.3.5/lib/initializer.rb:113:in `run'
   from ~/git/myproject/config/environment.rb:9
   from ~/.rvm/rubies/ree-1.8.7-2010.01/lib/ruby/1.8/irb/init.rb:254:in `require'
   from ~/.rvm/rubies/ree-1.8.7-2010.01/lib/ruby/1.8/irb/init.rb:254:in `load_modules'
   from ~/.rvm/rubies/ree-1.8.7-2010.01/lib/ruby/1.8/irb/init.rb:252:in `each'
   from ~/.rvm/rubies/ree-1.8.7-2010.01/lib/ruby/1.8/irb/init.rb:252:in `load_modules'
   from ~/.rvm/rubies/ree-1.8.7-2010.01/lib/ruby/1.8/irb/init.rb:21:in `setup'
   from ~/.rvm/rubies/ree-1.8.7-2010.01/lib/ruby/1.8/irb.rb:54:in `start'
   from ~/.rvm/rubies/ree-1.8.7-2010.01/bin/irb:17</pre>
  
  <p>The output from <code>ruby -v</code> is:</p>
  
  <pre>ruby 1.8.7 (2009-12-24 patchlevel 248) [i686-darwin10.6.0], MBARI 0x6770, Ruby Enterprise Edition 2010.01</pre>
  
  <p>And the output from <code>rails -v</code> is:</p>
  
  <pre>Rails 2.3.5</pre>
  
  <p>I've followed the basic guidelines from <a href="https://indextank.com/documentation/thinkingtank" rel="nofollow noreferrer">their documentation</a> and from <a href="https://stackoverflow.com/questions/3050366/no-such-file-to-load-yet-file-is-config-gem-in-environtment-rb-file-in-rails">similar SA questions</a>. But none of issues have the rails gem going missing..</p>
  
  <p>And yes, we are including rails in our Gemfile =)</p>
  
  <p>Thank you in advance.</p>