Container in navbar form constructor

Pass container as parameter in constructor of form type
Conditional tag for X-UA-Compatible

Please insert <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> into conditional tag, because its not validate for HTML validator, thx

http://stackoverflow.com/questions/14198594/bad-value-x-ua-compatible-for-attribute-http-equiv-on-element-meta
Merge pull request #465 from PayteR/patch-1

Conditional tag for X-UA-Compatible
Update NavbarRenderer.php
Adopted the changes from PR #464 with nested collections to master branch
Merge pull request #468 from peterrehm/master

Collections inside Collections - JS problem
Merge pull request #420 from jfx/master

Container in constructor of navbar form
Flash messages container ID

It would be cool to have ID for session flash messages, because of pointing that element with jQuery, thx
Merge pull request #469 from PayteR/patch-2

Flash messages container ID
Update navbar.html.twig

Adjust class of responsive navbar to be the same as shown in
http://twitter.github.io/bootstrap/components.html#navbar
at the Responsive navbar section
Removed wayward 'X' from code that was showing 'X is not defined' error in code.
Merge pull request #471 from frodosghost/master

Remove Wayward X
Merge pull request #470 from micromeers/master

Adjust class of responsive navbar to documentation of bootstrap