Split App (October) and Core (Library) providers

Prevents double password reset

Merge pull request #630 from jacobdekeizer/fix-redirector-registration

Restore Illuminate Redirector alias for backward compatibility

DRY up code

Fixes empty unique_site definition

Fixes inherited bug

This seems to allow escaped HTML through...

Fixes structure propagation support

Fixes storing an arrays in placeholders

Eg:

{% put pageTitles = {
      '0':  "Dashboard",
      '1':  "Products",
      '2':  product.name,
    }
%}

Merge pull request #629 from octobercms/develop

OC Release - v3.7

Fixes composer file inclusion error