adding dom manipulation example
fixing loadjson
 update version
fixing Function.prototype.bind PhantomJS issue, can now create p5 instances in unit tests
adding updatePixels method
Move `bind` polyfill to test environment

Declaring the polyfill within the test environment makes the library
source more direct, smaller, and easier to read.
Merge pull request #184 from jugglinmike/move-shim

Move `bind` polyfill to test environment
updating example
Merge branch 'master' of github.com:lmccart/p5.js