Merge pull request #7 from baibaratsky/master

Добавил в YM_AccountInfoResponse методы getIdentified() и getAccountType()
revokeOAuthToken exception fixed
revokeOAuthToken exception fixed
sum changed to 2 in mobile payment
sample exception with empty history fixed
Merge branch 'master' of github.com:melnikovdv/PHP-Yandex.Money-API-SDK
Merge with sum "2" from payment
* 'master' of github.com:melnikovdv/PHP-Yandex.Money-API-SDK:
  sum changed to 2 in mobile payment
Create log file instead of exception throwing