moved <memory> inclusion to common.h
Merge remote-tracking branch 'origin/alpha' into alpha

Conflicts:
	include/core/meshloader.h
	include/core/ressourcemanager.h

solved
KoRE: added Operation class
KoRE: added operation file
Merge branch 'alpha' of github.com:KoRE0/KoRE into alpha
KoRE: Wurstchaos