Release v0.6.0

Greatly improved ILGPU version that included significant performance and code quality improvements.

• Added support for new GeForce RTX cards.
• Added initial support for arrays in kernels.
• Added additional 3D indexing functionality to ArrayView types.
• Added automatic binding of accelerators in advanced multi-GPU scenarios.
• Tested debugging and profiling capabilities on NVIDIA GPUs.
• Released test framework to verify generated kernel code.
• Improved performance of predicates in PTXBackend.
• Removed strict array-length restriction from allocation nodes.
• Enhanced generation of get/set field operations.
• Optimized generation of conditional branches.
• Fixed invalid generation of predicate barriers in PTXBackend.
• Fixed invalid register allocation of string types in PTXBackend.
• Removed explicit tracking of predecessors in phi nodes.
• Fixed invalid debug assertion in SequencePoint.
• Fixed invalid alignment of shared-memory allocations in PTXBackend.
• Fixed invalid shared memory configuration of Cuda kernels.

Special thanks to @MoFtZ and @mikhail-khalizev for contributing to this release.