Removing unused md5 comparison

Adding formatting to CXX progress reporting to test to match others

Change-Id: Ia58ae102a266e3a9f7528b0726f1447403f5b1c7
Adding Ruby progress command callback example and test

Change-Id: I770962c994e211912756078863d24319a289ec8c
Merge topic 'SIMPLEITK-462_CommandClassAsSWIGDelegate' into next

8c1ccfa9 Adding Ruby progress command callback example and test
9c1c9b25 Removing unused md5 comparison