update for ZED SDK 4.2.2 (#243)

4.1 support

Merge pull request #232 from stereolabs/4.0.8

4.0.8

Update wrapper for ZED SDK 4.0.1 release

Update README.md

Release 3.1

Fix #141 get_sdk_version()

Update for ZED SDK 2.8 (#76)

Stable API (#62)

* API break, major changes: removed Py prefix, move to unified sl namespace

Fix #60 mem leak PyMat get_value