Style pages

Trello: https://trello.com/c/pllNosV1/68-give-pages-basic-styling

Styling is yet to be added to journalists/index and announcements/new

![add-styling](https://cloud.githubusercontent.com/assets/4560985/5299590/cef25ee2-7b96-11e4-8fa7-1beea75e8219.gif)

please indent as:

``` scss
<% if signed_in? %>
  <div class="search-bar">
    <button>Search</button>
    <input type="text" name="search" />
  </div>
<% else %>
  <div class="nav-actions">
    <%= link_to "Sign Up", new_user_path, class:"button" %>
    <%= link_to "Sign In", new_session_path, class:"button" %>
  </div>
<% end %>
```