Code cleanup, and updated access callback to not rely on relationships
Merge https://github.com/MorganDawe/islandora_solution_pack_book into 7.x
Merge branch '7.x' of https://github.com/Islandora/islandora_solution_pack_book into 7.x
updated according to code review.
As per code review, i have removed the vassardora book metadata tab and moved it into the vassardora module.
Removed reference to the mods read only form
Merge pull request #86 from MorganDawe/7.x

7.x