fixed incorrect actions before, after

[lkalinka]

Fixed wrong parameters, when called after and before

[marcojanssen]

What is wrong with the current handling of the before & after parameters? There is no need to check if it is callable, if it's not an exception will be thrown by Silex anyway..

[lkalinka]

Yes exception will be thrown... But if You want to execute a class for action after & before(for example: OAuthCheck), this handling of parameters will return error for function call_user_func_array - that some of parameters null given expected string or else. This is solution for this problem. Give a try to execute some class for after or before and this error will occure.

[marcojanssen]

addActions is called by every parameter making this a nasty quickfix. We should add some validation for each property before trying to add it with addActions