add more metadata overrides to canvas metadta api
changes for HTML-based image viewer
remove built files
convert parseInt to Math.floor; better image resize/pan
Merge branch 'master' of https://github.com/umd-mith/sga into umd-mith-master

Conflicts:
	drupal/themes/sga-theme/js/sc/shared-canvas.js
	shared-canvas/demo/js/shared-canvas.js
	shared-canvas/dist/shared-canvas.coffee
	shared-canvas/dist/shared-canvas.js
	shared-canvas/dist/shared-canvas.min.js
comment out dependence on svg-related libraries
renable marquee; hook up image zoom control to image control component
Merge pull request #53 from jgsmith/master

add more metadata overrides to canvas metadta api