initial commit

very nice marvel of magical meta-template-programming

wanna have base-class defining and interface and common functions for all
child-classes. but overload some functions for some types in a suitable child
implementation

kudos to aschepler. see https://stackoverflow.com/questions/22725867/eigen-template-parameter-in-specialization-of-pure-abstract-class/22726414#22726414

Signed-off-by: Martin Zenzes <mzenzes@mega2000.de>
Merge branch 'master' of https://github.com/marvin2k/templateSpecialization