check for book view workspace type
Merge pull request #258 from IIIF/bug-fixes

check for book view workspace type
default to a minimum of 150 height for thumbnails, but scale down in certain cases
Merge remote-tracking branch 'origin/master' into bug-fixes
replace current object button
Merge pull request #263 from IIIF/bug-fixes

Thumbnail regularization, replace object button
merged master
updated functions calls while exploring #264
resolved #254, fixes #264