tree a9ee0d3df4597890ba5922d0a2add68123fad976
parent 59cf02afdf79328d3ad2b34b6662c269e34e3a94
author martin f. krafft <madduck@madduck.net> 1373380775 +0200
committer martin f. krafft <madduck@madduck.net> 1374174271 +0200

Improve Entity class

Among a bit of cleanup, this mainly adds type-safety and a better
representation of instances.

Also, switch from nose to unittest.

Signed-off-by: martin f. krafft <madduck@madduck.net>