Two new pages and some additional adjustments by gallegogt@gmail.com

Updating with changes made by gallegogt@gmail.com and other menor adjustments to getting started or how use it, page.
La función **emit** NO pertenece a este helper, ella está ligada al mecanismo de [EventProviders](https://github.com/anijs/anijs/wiki/Custom-Events-Listening). Quizás su documentación deba girar alrededor de esto.