Create a wiki to make the README.md small and cleaner

[rafaelcn]

The purpose of this issue is to lay down what needs to be done in order to clean the README.md file which is huge!

• Page introducing Brain, the language and its features
• Page introducing Brain alphabet which teaches in small pieces of code what each operator does
• Compiler information, how does it work? What are the available options?

I think it would be healthier for the project to make README.md small, any information more than an simple introduction is too much.

[luizperes]

I think that we can remove the current status (together with the Kanban) and we will reduce it in nearly 30~40% what do you think?

[rafaelcn]

Awesome! We have the projects tab now that has almost the same feature.

[luizperes]

@rafaelcn Totally, that is a matter of moving the Kanban to there xD priority:low