Add Buffer Support

Add Buffer Example

Fix Buffer Test
added scope for gmail imap and smtp
Scope fix

Add "email" scope. 
This group of rights is only visible in Russian language (documentation bug?): http://vk.com/dev/permissions

Quote: "email (+4194304)	Доступ к email пользователя. Доступно только для сайтов."
etsy scopes
Added PHP 5.6 and HHVM to travis.yml
Added Ustream service
fix CurlClient and StreamClient tests
add Ustream service tests
updated to last github api version (v 11.10.343)
Added scope "email" for Vkontakte.
Implemented missing Harvest stuff and added example
add more valid scopes for Google+
Merge pull request #255 from Sumukh/master

Add Buffer Support
Merge pull request #289 from romeo7/added_support_email_for_vkontakte

Added support email for Vkontakte.
Merge pull request #296 from pospi/master

add more valid scopes for Google+
Merge pull request #259 from tom-ema/master

added scope for gmail imap and smtp
Merge pull request #277 from pcdevil/master

Added Ustream service
Merge pull request #288 from pitpit/github-api-update

Updated to last github api version (v 11.10.343)
Merge pull request #283 from mneuhaus/master

Implemented missing Harvest stuff and added example
Merge pull request #272 from ashleydw/master

etsy scopes