BUILD_DOCUMENTATION OFF by default.
BUILD_DOCUMENTATION OFF by default.

Reduce default build dependencies.

InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples