Merge pull request microsoft#1807 from Microsoft/Stabilization

Final merge of Stabilization into master

Merge pull request microsoft#1698 from Microsoft/Stabilization

MRTK 2017.2.1.2 Patch Release

Merge pull request microsoft#1614 from StephenHodgson/MRTK-Master_Clone

MRTK 2017.2.1.1 Patch Release

Merge pull request microsoft#1528 from Microsoft/v2017.2.0.1-Stabiliz…

…ation

2017.2.1.0 stabilization merge into master

Merge pull request microsoft#1178 from StephenHodgson/MRTK-DevMerge

Dev Branch -> Master Merge

Merge pull request microsoft#1021 from taylorjames9/Dev_Unity_2017.2.0

Motion controller examples.

Merge pull request microsoft#1096 from StephenHodgson/MRTK-Local

Updated Unity Editor to 2017.1.2

Merge pull request microsoft#964 from keveleigh/FixTeleportAndUpdateB…

…oundary

Fix teleport to match current shell and update stage to not move during teleport

Merge pull request microsoft#841 from StephenHodgson/HTK-Refactor

fixed cross platform support from last refactor PR