first koa run registry home page /
addd koa-jsonp, koa-bodyparser, fix / controller
change regsitry sync to koa
convert all middlewares to koa type
thunkify all proxy
change controllers/user.js to koa
finish registry user controller koa and update mm to support thunkify. fixed #196
fix auth middleware
convert registry/module.js to koa type
fix all the test of registry module.test.js
fix yield coWrite
add end() when ws write end
use yield exports.addPackageAndDist.call(this, next);
use outputError
change web connect to koa
controller/web/user.js to koa
all controllers to koa
fix sync 404 reason not clear
json body parse limit and bug fix.

 * override json limit to default 10mb. fixed #209
 * fix #210 addPackageAndDist package version detect bug
logger.error(err) should send err stack email notice