BUG: Use rounding in TestingStretchIntensity for portability

Change-Id: I803869ba6524e4e25bfdee9bed196df20769078d
BUG: Warn if unsupported ITK_BRAINWEB_DATA_ROOT is being used

Several system on the dashboard are still using this flag. Emit a
CMake warning so that these build can be identified an updated.

Change-Id: Ie64bc39680b850a9ca2596c5a864267fcfaedb39
ENH: Remove try/catch exception handling around dynamic_catch

A call to dynamic_cast will not throw an exception, ever. If
the dynamic_cast fails it returns 0, so it's pointless to put
it in a try/catch block.

Change-Id: Iae0f17504201e6b762cf2a3019abba9c36349325
Merge topic 'UseRoundInTestingStretch'

bcc998ae BUG: Use rounding in TestingStretchIntensity for portability
Merge topic 'WarnAboutOldBRAINWEBCMakeVariable'

00e44d53 BUG: Warn if unsupported ITK_BRAINWEB_DATA_ROOT is being used
Merge topic 'RemoveTryCatchForDynamicCast'

28a31e69 ENH: Remove try/catch exception handling around dynamic_catch