Concern show page modifications for DLTP-173

 * Create 2 column layout for Abstract.
 * Put representative_image into a span3 column and rest of content into
   span9 column.
 * Reduce some vertical space that seemed excessive between h2 heading
   on page.
 * Add word-break to external links urls that are way too long and set a
   minimum width for external links actions.

dltp-173#
Merge pull request #38 from ndlib/dltp-173

Concern show page modifications for DLTP-173
DLTP-189 Working on UI experience when curation concern encounter generic file without content

UI changes related to empty content on generic file

Adding missing file icon
changing edit and show page of generic file when content is empty

adding spec for empty content

DLTP-189 Wordsmith as part review with Chris

Change button name on edit page when empty file found
Change Thumbnail icon on the generic file with empty content
Disable download and Rollback button in case empty content found

Fixing failed spec

Changes from code review
Merge pull request #39 from ndlib/DLTP-189

DLTP-189 Working on UI experience on generic file without content
Adding helper method to normalize support email

I want to provide a means of having a common email and subject being
sent to the help request email address.

DLTP-224
Merge pull request #41 from ndlib/normalizing-support-email-subject

Picking up missing commits