Remove detectEmail and XEP-0147 url

https://github.com/sualko/jsxc/commit/7ea444276bedf4c29b81b7081a426d9e08
b5c6fc
https://github.com/sualko/jsxc/commit/91def2febcf621dd72df50849e564bdc7c
07bedb
https://github.com/sualko/jsxc/commit/d102d41f6b500f14c2c97abf692abef8a4
879ce5