pfoldA catches threadKilled: results collected so far will be returned
pfoldA collect partial results also when nested
pfoldA: ensure threads killed
Revert "pfoldA collect partial results also when nested"

This reverts commit 692f3098c09426608980160cd11b932b6518f896.
Revert "pfoldA catches threadKilled: results collected so far will be returned"

This reverts commit ada050cdad635d026e1f2c56fed827e60d8db93f.
Merge branch 'master' of colo2-c703.uibk.ac.at:~/tct/parfold

Conflicts:
	Control/Concurrent/PFold.hs
pushed version numbers of containers and mtl again
removed timedKill; catch EPIPE error in hClose