Move title below workflow bar

A quick and dirty pass at UI changes intended to move the story
title closer to the story content and therefore make it easier
to identify.

* Remove the logo bar.
* Move the story title below the workflow step bar.
* Move the "tools" menu into a collapsible menu inside the workflow
  step bar.

There's still lots of cleanup work with this still to be done.

In particular, the event that triggers the class change that shows
the title bar seems to happen after the padding of the section/drawer
is calculated.

Addresses #579
Adjust subview and drawer padding when title is revealed

With the updated layout in 4fbf517ddea7a10afd817265b1dfa495b70a36ec,
the header height changes from the template selection step to the
other steps due to the story title bar being revealed.  In addition
to adding the ``has-story`` class (which will trigger CSS styles
that show the title bar) readjust the padding on the subview
container and drawer elements.

Addresses #579
Merge branch 'develop' into 579-rework_header
Remove commented styles

Since we're committing on moving the title bar below the workflow
step bar, remove the old styles that had been temporarily commented
out.

Addresses #579
Adjust title styles

Now that the title and byline are in it's own bar, adjust the styles:

* Make the title and byline 100% of the container width
* Make the inputs slightly wider
* Make the fancy tooltip show at the top-left of the title element
  instead of in the center.

Addresses #579
Refine tool menu behavior

Since the tools menu has been turned into a dropdown:

* Open the menu before showing the preview and exit tour guiders.
* Use the slideToggle() jQuery effect instead of toggle() to show
  and hide the menu.
* Show the tooltips to the left of the menu items.
* Close the menu when the "Preview" item is clicked.

Addresses #579
Workflow step link colors

As per the request at
https://github.com/pitonfoundation/atlas/issues/579#issuecomment-30435243
update the workflow step link colors so they match site-wide navigation
and the active/available steps are more clear.

* Disabled steps are gray
* Available steps are white
* Current step is orange

The icon for the selected step stays white because I don't know the
location of the design file to create the hammer icon in orange.

Addresses #579
Allow "<br>" tags in summary and call to actions

Update the default ``STORYBASE_ALLOWED_TAGS`` setting to include
``<br>`` tags.

Closes #912
Correct version numbers
Merge branch 'master' into develop
Provide fallback for missing byline

When the user does not specify a byline, show the user's first name
and last initial as the byline on the story detail page.

This was already the behavior for the story viewer.

Addresses #907