added oauth for twitch
fixed Twitch setup instructions
Merge pull request #382 from redshark1802/master

added oauth for twitch
Fix previous merge
Fix wrong function usage in MailRuResourceOwner
Added Eventbrite, Trello resource owners
Force HTTP method name to be uppercase

Ref: Spec: 9.1.3 (1)
http://oauth.net/core/1.0a/#rfc.section.9.1.3
Fix built-in user providers
Merge pull request #324 from stloyd/bugfix/user_providers

[RFC] Fix built-in user providers
Removed Symfony 2.0 hack
Removed SecurityListenerFactory check for Symfony 2.0
Facebook breaks OAuth2's specification by using expires instead of expires_in
Make OAuthUtils::signRequest() compatible with specification
Merge pull request #392 from XWB/facebook_hack

OAuthToken: Facebook uses "expires" instead of "expires_in"
Merge pull request #390 from XWB/cleanup

Removed Symfony 2.0 hack
Merge pull request #391 from XWB/remove_security_listener_factory_check

Removed SecurityListenerFactory check for Symfony 2.0
Merge pull request #387 from stloyd/feature/new_ro

Added Eventbrite, Trello resource owners
Fix misplaced setting in security docs. Fix #393
Merge pull request #389 from stloyd/bugfix/utils

Make OAuthUtils::signRequest() compatible with specification
Prepare release 0.2.8