Merge pull request #32 from raffazizzi/master

Merging drupal development
Merge pull request #6 from umd-mith/master

Update with latest from umd-mith repo
add extent tracking to presentations
merging remote
Merge pull request #33 from jgsmith/master

Add height tracking to presentations
resize text display when text overflows vertically; convenience methods for getting canvas-related metadata
make canvas height the minimum text view height
Merge pull request #34 from jgsmith/master

Add metadata collection for canvases for display; finish first pass at showing all text in text view