Fix a bug in Router#url & append Router object to ctx.#350

Merged

jbielick merged 3 commits intoZijianHe:masterfrom HeavenDuke:master

May 22, 2017

+45-4

Commits on Apr 25, 2017

fix bug in Router#url without affecting other api
HeavenDuke
committed
add router to ctx(in order to use related method such as url within koa app).
HeavenDuke
committed

Commits on May 10, 2017

withdraw support for older version of nodejs in travis
HeavenDuke
committed