title: RVM isn't recognized until I run "source ~/.profile" in terminal
body: <pre><code>sergio@sergio-VirtualBox:~/code$ rails -v
  The program 'rails' is currently not installed.  You can install it by typing:
  sudo apt-get install rails
  
  sergio@sergio-VirtualBox:~/code$ source ~/.profile
  
  sergio@sergio-VirtualBox:~/code$ rails -v
  Rails 3.2.1
  </code></pre>
  
  <p>Any ideas why the command doesn't work until I run "source ~/.profile"? I would like to not have to do this every time I run my machine or open a new terminal window.</p>