DateTime: Removed unnecessary DataTime class to ease programmatic usage.
DateTime: Removed unnecessary DataTime class to ease programmatic usage.

Update issue 415
Removed unnecessary DataTime class. This eases programmatic usage because
there is no need to create dummy instances.

userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3,userzimmermann/robotframework-python3