LIVEOAK-326: Show error page when something fails instead of blank or not found.
Merge pull request #250 from ammendonca/LIVEOAK-326

LIVEOAK-326: Show error page when something fails instead of blank or not found
LIVEOAK-154 Inline HTML representation's CSS
 - Remove liveoak.css from admin app and remove css resource
 - Inline CSS in HTMLEncoder
LIVEOAK-297 Switch from println to logger usage
 - Use log.error() instead of exception.printStackTrace()
LIVEOAK-449: Enhance security pages workflow
* Different messages depending on existing storage resource and collections;
* Add ability to add a collection from security policies page when there are storage resources but no collections;
* After successfully adding collection, the user is sent to the page to secure the new collection;
* When securing a collection and a new role is added, it is automatically selected;
* Add ability to add a collection from securing collection screen, selecting it in the dropdown;
Merge pull request #251 from ammendonca/LIVEOAK-449

LIVEOAK-449: Enhance security pages workflow