adding CSS shapes sample
Removing the jpg cat
Encoding API sample

Data files and code for the the Encoding API sample.
File Constructor sample
Network Information sample.
Added back in butterfly as part of WebP+picture demo
Merge pull request #10 from pearlchen/gh-pages

Added back in butterfly as part of WebP+picture demo
Map, Set, and for...of iterator samples.
Comment tweaks.
Merge pull request #6 from jeffposnick/encoding-api

Encoding API sample
Fixing description typo
Merge pull request #3 from devnook/cssshapes

CSS Shapes demos.
Additional Map iterator examples, and example of using an Object as a Map key.
Added a comment about ES6 support for assigning to an array of variables in a for() statement.
Merge pull request #9 from jeffposnick/network-information

Network Information sample
Merge pull request #7 from jeffposnick/file-constructor

I'm going to merge for now, but if anyone (in particular @ebidel, since I know he's the File APIs expert) has ideas for an improved example, I'd be happy to tweak things.
Merge pull request #12 from jeffposnick/collections-iterators-es6

Merging following some out of band reviews.