Specify UTF8 encoding in examples

When I tried opening the example HTML files in my browser this is what I saw:
![screen shot 2014-11-07 at 16 30 48](https://cloud.githubusercontent.com/assets/632942/4960812/4e84ad52-66c7-11e4-85a3-416dca4fbc25.png)

It's because the encoding (UTF-8) wasn't specified. Here's how it looks when it's specified:
![screen shot 2014-11-07 at 16 31 12](https://cloud.githubusercontent.com/assets/632942/4960757/ba6fbdaa-66c6-11e4-83ff-0e7dd82993d4.png)

Note: I'm not using any sort of web server that would declare an encoding for me. Just the local HTML files accessed via file:///

This patch specifies the encoding on the example pages. I'm sure there are other ways of accomplishing this but here's my fix!