add states/counties example and data
Squashed 'subtree/bokehjs/' changes from 80b81bb..b8ea8f7

b8ea8f7 datarange should ignore nan's in min/max computation
690cc78 fallback for browsers that don't implement requestAnimationFrame
78a922c merged single_gridplot_toolbar
c10ea49 throttleAnimation now works in conjuction with requestAnimationFrame for much better rendering performance that doesn't overwhelm the browser
3bdc5e6  better styled gridplot buttons
ebbd911  the gridplot now interogates all sub plots, hides their toolbar, and makes sure that a button exists for the union of all tool types
792ea35  basic working global toolbar
eb371ab indentation

git-subtree-dir: subtree/bokehjs
git-subtree-split: b8ea8f7b17b69c84b08b6df8a410b7b3e17a29d8
Merge commit '2311f6b482e3e33fb271cc0db9ffad13bef935a3'
update iris data set to use submodule, update iris.py example
Merge branch 'master' into sampledata
add state, county, and unemployment data, download() function, and choropleth example
update built js
Merge branch 'master' of github.com:ContinuumIO/Bokeh