Adding Compare class for transform classes.

Following along the lines of the ImageCompare class, and new transform
compare class is being added. This class converts the transform into a
displacement field to do the comparison.

Change-Id: I94cbade9b533f40bcc8a29873286669a67e09efb
Adding basic comparison driver to compare a transformation

Change-Id: I433bd66646e5ac033caf42ae318f7e7f33b80f04
Adding basic test of the transform compare driver

Starting to use a sitk_add_test wrapper around test to use a standard
external data work flow.

Change-Id: If432bc418b3cf8cd56521cbed3579474b53adb30
Don't automatically convert to md5 hashes for files.

Currently we are using a script to manually upload files to
midas. There is nor pre-commit hook, therefor don't create the hidden
.External data hash file as the UploadBinaryData.py script can not be
used.

Change-Id: Ibaa14e513afb4c50b30f01da4d76fefff913fe9a
Moving Python tests to the AdditionalTests file

Change-Id: Iddd1afe89849c1e7337828734f401d29a996c750
Update Python Examples and manual unit tests with standard DATA{}

Change-Id: I45136dd943f4bd644c15478a60126b0ecff5ba71
Merge topic 'SIMPLEITK-536_CreateTransformTestingInfrastructure' into next

8983a4a2 Update Python Examples and manual unit tests with standard DATA{}
e750844f Moving Python tests to the AdditionalTests file
0db0733d Don't automatically convert to md5 hashes for files.
6528f65f Adding basic test of the transform compare driver
658e4954 Adding basic comparison driver to compare a transformation
a4748fc7 Adding Compare class for transform classes.