1.0.6 - Optimized tile fetch/decode

What's Changed

• Cleanup by @CelliesProjects in #83
• Add option to force single core decoding by @CelliesProjects in #84
• Fixed unused variable warning when CORE_DEBUG_LEVEL == 0 by @CelliesProjects in #85
• Cleanup destructor by @CelliesProjects in #86
• Optimize PNG decoder initialization by @CelliesProjects in #87
• Refactor tile worker startup for robustness and efficiency by @CelliesProjects in #88
• Add pioarduino links by @CelliesProjects in #89
• Mark tiles as not busy in the decoding task by @CelliesProjects in #90
• Cleanup by @CelliesProjects in #91
• Update README.md by @CelliesProjects in #92
• Bump version to 1.0.6 by @CelliesProjects in #93

Full Changelog: 1.0.5...1.0.6