Added support for different response formats.
Support for error response in different formats.

load ErrorException manually because autoloading them will not work
when error occurs while autoloading a class

Call static::mkdir(...)

Compose Message Command

FileHelper port from 1.1.x

pgsql schema findColumns fix

API consistency in Response class

use `getIs...` instead of `is...` to allow these methods to be used as
virtual properties.

This is forconsistency to the rest of the framework.
Only methods that take parameters may be named `is...`.