Update net/mpich2 to version 1.5_2,5
Update multimedia/aegisub to version 3.2.0_2
Tweak science/py-scipy version 0.14.0_4
Update net-mgmt/icinga2 to version 2.1.1_1
Prune benchmarks/flowgrind
Prune comms/usbmuxd
Prune print/pdfjam