ENH: adding ProcessObject::PreUpdate to manually written filters

Change-Id: I977f4b211e03bce77216593cbba7e2852028e92b
BUG: Adding ImageFilter suffix to manual filters GetName string

Change-Id: Icd2a9ff3554a9947b964b092362d543d94c528c0
Adding test of commands for cast filter

Change-Id: I75873fa6e301689d9fa4e8f98f11c0fb2b5549b0
Adding test for aborting statistics filter

Change-Id: Ib056cf712388b566e3f8dba19d6f3513daa48094
Merge topic 'SIMPLEITK-453_AddEventCallbacks' into next

74d093a3 Adding test for aborting statistics filter
a2c345f3 Adding test of commands for cast filter
9018083b BUG: Adding ImageFilter suffix to manual filters GetName string
e1272907 ENH: adding ProcessObject::PreUpdate to manually written filters