Add to success images to users/:id/tutorials/:id show page once tutorials are submitted

[jendiamond]

Pull Request #59

tryruby-success.png

trygit-success.jpg

terminal-success.jpg

htmlcss-success.jpg

Rails Girls LA Logo - railsgirlsla.png

[jendiamond]

<% if @tutorial.try_ruby %>
  <h3>Sweet! You have passed the Fox Level.</h3>
  <%= image_tag "tryruby-success.png" %>
<% end %>

<% if @tutorial.try_git %>
  <h3> Awesome! You have passed the Octocat Level.</h3>
  <%= image_tag "trygit-success.jpg" %>
<% end %>

<% if @tutorial.terminal %>
  <h3>Hooray! You have passed the CloverLevel.</h3>
  <%= image_tag "terminal-success.jpg" %>
<% end %>

<% if @tutorial.html_css %>
  <h3>Fantastic! You have passed the Serpent Level. </h3>
  <%= image_tag "htmlcss-success.jpg" %>
<% end %>