add authors
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Merge pull request #37 from juliangruber/patch-4

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Merge branch 'master' of github.com:koajs/koa
use GH style .repository
replace "qs" with native "querystring" for now
docs
docs
add Context#hasContent
fix app-level error delegation, always delgate
add pipe example. Closes #9
refactor example
refactor examples
change app to emit "error" events instead of app.error(fn)
docs
add error handling example
add Context#error(). Closes #31
docs
add conditional middleware example. Closes #5
typo