Restructuring the learn section

[froschdesign]

Problem

At the moment the learn section on the documentation entry page / overview only includes tutorials for zend-mvc based applications. zend-expressive is missing completely.

The result of the problem: the available PSR-15 middleware solutions are overlooked.

Ideas

Restructuring the learn section with the tutorials.

• move the tutorials to the section "MVC Framework"
  • extract the migration part
  • move the component tutorials to the related component documentations

or

• finish the zend-expressive tutorial and add this to the learn section

Changing the order of sections / groups should not be forgotten!

/cc @settermjd @weierophinney @Xerkus

---

See also: zendframework/zf3-web#102

[Xerkus]

Move mvc tutorials to mvc, expressive at expressive.
Add intro for each of them to the learn section, make intro lead to each respective tutorial and quick start

[settermjd]

I like @Xerkus' suggestion. Thanks for reporting it, and sorry to hear about your team choosing Symfony.