Work in progress

* [x] Refine post content
* [] Add a page with instructions:
    * Instructions for quick post (GitHub UI)
    * Instructions for posting with git
 * [] Add a page with instructions about enhance the template
Work in progress

* [x] Refine post content
* [] Add a page with instructions:
    * Instructions for quick post (GitHub UI)
    * Instructions for posting with git
 * [] Add a page with instructions about enhance the template
Working on "colaborar" page
Fixes in colaborar page