Updated friendly id behavior

New ids are not generated on the title changing. Doing so would result
in links being broken in the future.

If a slug is already taken, try adding the author's name to make a
unique slug.
Merge pull request #30 from tiy-durham-q3-rails/friendly

Updated friendly id behavior
set up ui for videos, complete workable todo- add embeded links
I am now retrieving a Faraday object response from the urls
used a thumb on video index and embeded the video on the show page TODO embed the video in a modal
fixed some of the css for the videos
Merge pull request #32 from jcward10/video

Video embedding
Fix tests for videos
Remove scaffolding CSS
Make videos work with friendly_id
Standardized column names across books and videos
Changed javascript driver to poltergeist
Fixed styles on videos to match rest of site
Merge pull request #35 from cndreisbach/videos

Tightened up videos