Improve world renderer

In this MR I rewrote the complete world renderer (e.g. chunks). It also fixes some bugs in the new chunk format.

ToDo:

• Frustum culling
  • 2 algorithms
    • Fast one (old one): Only tell if it could be in the frustum
    • -> If yes (or no; depends on algo) use complex one to check
  • extreme chunk section values (most east[…] block; highest block; lowest block)
  • "Cave algorithm" (Occlusion culling)
• 3 Meshes per section (opaque; transparent; translucent)
• Preparing in nearer to further away order
  • unload meshes if block changed and not in frustum
  • only prepare if chunk is in frustum
  • don't prepare empty chunks
• Light
  • Client side light engine
  • Lightmap
  • Smooth lighing
  • Ambient occlusion
• Transparency
  • Sort faces
  • 2 render modes: Fast/Default
    • No block translucency
• water logged & FluidFillable properties
• Force interrupt preparing if needed (e.g. new block change; light change; more important task in thread pool)
• "Resolving" of block models
• Chunk cache clearing (default F3 + A)
  • Respawn
• texture animations
• require neighbour chunks loaded
  • Also don't load if block changes in chunk (e.g. when movement is disabled and walking to chunk border and destroying block)
• View distance
  • Server side
  • Client side
• Rewrite renderers
• Check neighbour positions
• Cache biomes
• "Fast biome" in 19w36a+
• Improved biome blending
• Performance optimizations
  • Don't render bedrock on y == dimension::minHeight
• Meshing
  • Normal culling
  • Greedy meshing
• Model deciding (for pre flattening versions)
• Assets manager: Create file from jar with all models inside and load models from there (make them moddable)

ToDo (Fixes):

• Update neighbour chunks if needed
• Biomes: Check if chunk is single biome
• Sometimes not culling between stairs (or other special blocks)
• Vines texture top

Other breaking changes:

• Use GL_QUADS when available (downgrade opengl to 3.0 in context creation)
• Improve HUD memory usage
• Create all mesh buffer with memAllocFloat
• Improve tinting performance
• Improve frustum culling performance
• Fix chunk neighbour detection
• Improve ThreadPool performance drastically
• Fix some lock issues in SemaphoreLock (and rename it)
• Particle fixes, performance improvements
• Disable collisions as spectator
• Fix blending with sun

Fixes #18 (closed), #19 (closed), #22 (closed), #41 (closed), #24 (closed)