title: Bundle Install not working; mini_racer can't find v8
body: <p>I'm having issues with bundle install running. it seems that mini_racer can't find v8 on my system. I'm not sure what to do. I've uninstall and reinstalled multiple times. Here is the output.</p>
  
  <pre><code>    /Users/gregg/.rvm/rubies/ruby-2.1.4/lib/ruby/site_ruby/2.1.0/rubygems/ext/builder.rb:89:in `run': ERROR: Failed to build gem native extension. (Gem::Ext::BuildError)
  
      /Users/gregg/.rvm/rubies/ruby-2.1.4/bin/ruby extconf.rb
  checking for main() in -lpthread... yes
  checking for main() in -lobjc... yes
  creating Makefile
  
  make "DESTDIR=" clean
  
  make "DESTDIR="
  compiling mini_racer_extension.cc
  clang: warning: argument unused during compilation: '-rdynamic'
  mini_racer_extension.cc:4:10: fatal error: 'include/v8.h' file not found
  #include &lt;include/v8.h&gt;
           ^
  1 error generated.
  make: *** [mini_racer_extension.o] Error 1
  
  make failed, exit code 2
  </code></pre>