0.4.0 - Performance Optimization part 1 and more

What's Changed

• Go to Lua editor directly from test output by @elgopher in #9
• Increase performance of presenting test output by @elgopher in #16
• Throttle test execution when tests are too fast by @elgopher in #15
• Optimize comparing userdatas by @elgopher in #10
• [bugfix] Deselect test on re-run by @elgopher in #17
• [bugfix] Change maximum lights height by @elgopher in #18
• [bugfix] Lights link to wrong tests by @elgopher in #19
• Update screenshot in README by @elgopher in #11
• GUI refactoring by @elgopher in #12
• Another refactor by @elgopher in #13

Full Changelog: 0.3.0...0.4.0

Please download unitron.p64.png file and place it somewhere in Picotron folder (desktop for example).