2020.5

Input block, gyro for TRIK, lots of tests

* Input block support to read from keyboard
* The same gyro interface for JS/Py as on the TRIK controller
* Fixed Clear Encoder block for EV3, and other EV3 small issues
* Unit-tests from QReal and a pack of integration tests for CI
* Fixed a lot of memory leaks
* Improved scene rendering, faster and smoother
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Patch 4