update some contents for the upcoming release (ebook too)
shortcut of app.Run(iris.Addr(...)) is app.Listen
add Localization and Sitemap sections (for v12.1.0+)
update builtin middleware list
update wiki to iris v12.0.0
add more text under the compability with net/http
add a small convert net/http.Handler to iris.Handler section at the Routing-middleware
minor spelling and formatting
re-write the wikis for the upcoming version. About, Installation, Support, Getting Started and Routing sections completed.