Merge pull request #1625 from bamarni/file-extensions

fixed some file extensions
Merge pull request #1628 from MattKetmo/config-typo

[Cookbook][Extension] Fixed typo in functions name
Merge branch '2.0'
Added cascade_validation specification
Merge pull request #1626 from bit-Shark/master

Added cascade_validation option specification
Tweaks for #1626 and the cascade_validation option
Fixed GenericEvent method names
Added links to the DOMCrawler and CSS Selector components from testing page
Update book/controller.rst
Fixed a parameter's name.
Added a missing comma after an array element.
[book/doctrine] Transform parameters file to yml
As of Symfony2.1 the parameters file is a yaml file and not an ini file
Clearify effects of flash message methods
fixed a note about private services
Merge remote-tracking branch 'origin/installation-refactor'
Fixing 2 small things thanks to @WouterJ and @Stof
Tidied up a bit of grammar and added a link to the EventDispatcher docs in the before/after filters article
Merge pull request #1630 from thekarel/generic_event_method_names

Fixed GenericEvent method names
Merge pull request #1631 from richardmiller/adding_links_to_relevant_components

Added links to the DOMCrawler and CSS Selector components from testing page
Remove references to verbose profiler option

This option is deprecated in 2.1 version