ENH: Add CornerAnnotation extension

Description:
This is an module to display annotations, time count, node elements on
each panels on the Slicer user interface

Contributors:
Atsushi Yamada (Shiga University of Medical Science, Japan)
Merge pull request #766 from ayamada0614/add-CornerAnnotation-4.3

ENH: Add CornerAnnotation extension
ENH: Updated ModelToModelDistance to version 1.1

A lot of additional things have been changed in 3DMeshMetric but this is irrelevant for this 3D Slicer extension as only ModelToModelDistance is in the extension

https://github.com/NIRALUser/3DMetricTools/compare/3f4a9be5b2cd4a36ac502a276a9a32d82c33dbd3%E2%80%A6c418cf6b1435d2fb2add9bc6b66920d9cbcb074d
Merge pull request #768 from fbudin69500/update-ModelToModelDistance-4.3

ENH: Updated ModelToModelDistance to version 1.1