ClusterEngine.cluster(): remove unused return value
get_cdrom_drives(): code cleanup
File._load(): makes proto matches subclass definitions, add filename parameter
Indentation fix
Unused variable `e` removed
Rewrite loop as expression value is unused
Rewrite test as expression value is unused
Rewrite loop as expression value is unused
Add missing header
coding: UTF-8 -> coding: utf-8, as all other files
Merge pull request #196 from zas/bunch_of_cleanups

Bunch of cleanups