add conf for a possible pdf viewer
Merge branch '7.x' of git://github.com/Islandora/islandora_solution_pack_pdf into 7.x
Use hooked access callback.
Merge pull request #50 from adam-vessey/7.x-hooked-access

Use hooked access callback.
Added Schema for SEO
Merge pull request #51 from morganhi/7.x-Schema

Added Schema for SEO
Implemented new print hook.
correct schema.org integration
Merge pull request #53 from ruebot/7.x-correct-schema.org

correct schema.org integration
Implemented feedback from the create print module code review.
Updated with code review feedback.
Merge pull request #52 from MorganDawe/7.x

Implemented new print hook.
Added travis, changed README to Markdown and fixed coding standards issues.
Implement the new derivative structure.
Fixed incorrect function documentation.
Add the pid to the dsm.
Merge pull request #54 from christianselig/7.x

Added travis, changed README to Markdown and fixed coding standards issues.
Merge branch '7.x-derivatives' of github.com:jordandukart/islandora_solution_pack_pdf into 7.x-derivatives

Conflicts:
	includes/derivatives.inc
Display the error message in the failure output.
Carry through changes of Islandora constants.