Map#keys, Map#values, Map#entries
Map#clear; Set#keys; Set#values; Set#entries
If the existing Map and Set do not conform to spec, overwrite them with our conforming shims.
Updating chai.
Adding ES5-shim to dev dependencies.
Use npm installed assets instead of hardcoded "vendor" assets.
Merge pull request #59 from Yaffle/master

Map#keys, Map#values, Map#entries
Merge pull request #60 from ljharb/fix_collections_in_firefox

Overwrite Firefox's broken Map/Set implementations
Merge pull request #61 from ljharb/use_npm_for_html_tests

Use npm for html tests