Documentation

Documentation of Add-Methods in UniversalObjects.gd
- Kernel
- Cokernel
- Initial Object
- Terminal Object
- Coproduct
Documentation

Documentation of Add-Methods in UniversalObjects.gd
- Direct Product
Bugfix in Pullback and Pushout

Found wrong order of arguments in methods
- AddProjectionInFactorOfPullbackWithGivenPullback
- AddInjectionOfCofactorWithGivenPushout
while documenting.
Finished documentation of Pullback in UniversalObjects.gd.
Documentation

Documentation of UniversalObjects.gd
- Pushout
Documentation

Documentation of UniversalObjects.gd
- Image
Updated packageinfo