Moved SCParser into the Sigma::parser namepsace
Removed LogSystem and components

LogSystem was just a very basic demo system that isn't useful and
practical. It has been removed along with the LogQueue component.
Removed ISystem.h added Property.h

ISystem.h used to contain the ISystem interface and the Property class.
ISystem is no longer used and as such just Property remained and the
file was renamed.
IGLComponent::Transform returns a pointer now

By returning a pointer instead of a reference it can now be passed with
a Property container.