first part of getAvailableSlots. DOES NOT COMPILE

 - commit mostly for merging-purposes (use this commit as pick, to
   squash over the next ones)
Merge branch 'feature-get_available_slots' of ssh://github.com/slizzered/scatteralloc into feature-get_available_slots

Conflicts:
	src/include/scatteralloc/creationPolicies/Scatter_impl.hpp

 - merged the patch with the small memcpy bugfix (squash)