Animated pages flipping in pager
Images in slides and tiles loaded at size - great speed enhancement
Added transition duration property
refs #707
Added missing viewer css png
refs #692
Merge branch 'master' into p-enh
Merge branch 'master' into p-enh
Added missing references in viewer app
refs #688
Merge branch 'master' into p-enh

Conflicts:
	pisak/viewer/album.json
	pisak/viewer/app.py
	pisak/viewer/library.json
Merge branch 'master' into p-enh

Conflicts:
	pisak/viewer/app.py
Merge branch 'master' into p-enh