aggregate on kc level
Merge commit 'dd1a5e3825f5e21e382473b934d11743043912be'

* commit 'dd1a5e3825f5e21e382473b934d11743043912be':
  allow overlapping kcs in multiple files
  added support for multiple files
  added comments
  use mean instead of median

Conflicts:
	white.py