Added instagram provider
Fixed PHPCS
Bringing back AuthenticationAdapterChainFactory

When doing provider authentication set a custom auth adapter in the ZfcUser Controller Plugin. The factory creates a new instance of the AdapterChain with only the HybridAuth adapter. It also makes sure to reset ZfcUser module options.
Merge pull request #126 from Hounddog/instagram

Added instagram provider
PHP-CS-Fixer
Merge pull request #128 from SocalNick/hotfix/dedicated-auth-adapter-chain

Bringing back AuthenticationAdapterChainFactory