Merge pull request plasma-umass#153 from siedentop/patch-1

Rust: Document `scope` in favor of `begin`/`end`.

Merge pull request plasma-umass#133 from plasma-umass/housekeeping

Fix some minor code and style issues

Switching to python 3. Fixes plasma-umass#106

Switching to python 3. Fixes plasma-umass#106

Including updated, unminified javascript and css for dependencies. Refs 

plasma-umass#48