Merge pull request #1178 from leekchan/master

Fixed some typos
Add test for tornado.escape.recursive_unicode
Merge pull request #1182 from Parkayun/master

Add test for tornado.escape.recursive_unicode
Merge pull request #1179 from leekchan/master

Added a unit test for setting a cookie with max_age
Added unit tests for tornado.web.removeslash and tornado.web.addslash