Follow File Name Conventions

File naming conventions now state that all PHP files (except templates) should
be lower-case and use underscores to separate words in a filename.
Merge pull request #6 from nigelgbanks/7.x-filename-conventions

Follow File Name Conventions
changed callback to make it aware of object being diplayed
Merge branch '7.x' of github.com:Islandora/islandora_openseadragon into 7.x
Update README.txt
Update README.txt