2019.8

TRIK: Upload all opened .py and .js files
TRIK: fix commas in `print` in JavaScript
2D-model: fix loading of JPEG images on Windows
TRIK: Python engine uses the same `timer` implementation as JS
Text editor: unmatched braces highlighting + enable regions folding
TRIK, 2D-model, JS: fix video-based line sensor interpretation
EV3, 2D-model: lots of improvements for distance sensors handling
2d-model: use latest Box2D for `real physics` mode
Other: .qrs format changed to be ZIP
Other: lots of improvements in 2D-model scene drawing tool

2019.7

1. Main feature of this release is a set of improvements in 2D model scene drawing and manipulation
2. Fixed lots of minor issues with images
3. EV3 fixes for gyrosensor and subprograms
4. Fixed some annoynig issues with realistic physics
5. Python improvements: mostly works for all examples.

2019.6

After summer camps testing and summer hackathon

- Fixed crash and missing shared object in GNU/Linux installer
- Realistic physics option is now part of the world/save file and warning message is produced to turn it on when needed
- Fakescene/invisible background support
- Corrected EV3 ultra-sonic distance sensor mesurement units (now metric system, cm).
- Unified NXT/EV3 sensors' names
- EV3 color sensor modes (Ambient, Reflected)
- HiDPI / Retina screen resolution support
- macOS installer CI and auto-deployment, Qt5.12.4, but still alpha quality

2019.5

Gyro, show(array), IR Seeker, while

- Gyrosensor for EV3 in 2D model/simulation
- Function block renamed to Expression (code).
- Replace By context menu now has icons for blocks
- Fixed crash when JavaScript execution in 2D-model was stopped with
toolbar button
- Checker service can check JS.
- EV3 IR seeker support
- Fixed encoders in 2D-model when robot is stuck
- `While` block for NXT
- `brick.display().show(array, width, height, format)` format is
`"rgb888"`, `"grayscale8"`, `"rgb32"`
- `width` for `wall`s in xml.

CHECKER-2019.5-RC0

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