Merge pull request #29 from airbnb/enforce-single-quotes

[jshint] Enforce single quotes
Optimization Array#join
Merge pull request #30 from Laboratory/master

[Arrays] Optimization Array#join
Less dogmatic about instance methods returning this.
[in the wild] Add list of organizations using the style guide or a fork of it
[in the wild] add shutterfly
[arrays] direct/push/copy
[naming conventions] saving reference to this, use _this. fixes #32
[in the wild] add MinnPost
[in the wild] add howaboutwe example
Merge pull request #33 from rma4ok/master

[arrays] direct/push/copy
[arrays] update jsperf links. fixes #27
[resources] add other styles section, so folks can make their own decisions
[resources] better title
[performance] add jsperf for innerHTML vs textContent for script text
manual semicolon insertion
adds space to string example
use double quotes in markup
missing return
[types] switch to lowercase to not confuse with constructors