Fix PSR: Constants must be uppercase
Fix PSR: Class constants must be uppercase
Fix PSR: _ prefix

* Method name "_method" should not be prefixed with an underscore to indicate visibility
* Property name "$_prop" should not be prefixed with an underscore to indicate visibility
Revert "Fix examples to conform to requirements for PHP 5.2.4"

This reverts commit 07d39634721a89c1b11e519b5b24242ac3453016.

Conflicts:

	examples/echo_bosh_bot.php
	examples/echo_bot.php
	examples/echo_component_bot.php
	examples/http_bind.php
	examples/http_pre_bind.php
	examples/muc_log_bot.php
	examples/pipes.php
	examples/publisher.php
	examples/register_user.php
	examples/subscriber.php
	examples/xfacebook_platform_client.php
	examples/xmpp_rest.php
	examples/xoauth2_gtalk_client.php
Merge branch 'ft-psr-non-bc' into develop
Rename tests
Update phpunit
Switch off line length warnings in phpcs
Add notes for contributors