TLDR: More trajectories, performance gains, and full pytorch support with autodiff !

What's Changed

• Add helical and annular shell trajectories by @Daval-G in #34
• Add Seiffert spiral and shell trajectories by @Daval-G in #36
• Trajectory display overhaul by @Daval-G in #37
• Add 3D wave caipi by @Daval-G in #38
• feat: use a very large coil dimension for 2D stacked NUFFT by @paquiteau in #39
• Testclean by @paquiteau in #43
• Better docs by @paquiteau in #40
• Expansion overhaul by @Daval-G in #41
• Update test-ci.yml by @paquiteau in #52
• feat: use enums by @paquiteau in #55
• Improve the display config by @paquiteau in #54
• Propeller by @Daval-G in #56
• Benchmark tweaks by @paquiteau in #62
• Density compensation by @paquiteau in #66
• Dispatch density methods in operators by @paquiteau in #68
• Some fixes for pipe density by @paquiteau in #75
• Doc improvements by @paquiteau in #74
• style: run black 24. by @paquiteau in #79
• fix: robust voronoi estimation. by @paquiteau in #78
• feat: cherry-pick torch and lipchitz. by @paquiteau in #76
• Direct Torch and CUPY support for gpUNUFFT arrays by @chaithyagr in #80
• feat: add batch support for gpunufft. by @paquiteau in #81
• Test refactor by @paquiteau in #83
• Fibonacci patch by @Daval-G in #86
• fix #91 by @paquiteau in #92
• share a 2D nufft across Stacked Operators by @paquiteau in #87
• feat: add examples creating GIF of trajectories. by @paquiteau in #93
• fix: broken link by @paquiteau in #94
• Add MRI-NUFFT scheme image by @paquiteau in #95
• Fix NDFT tests by @chaithyagr in #96
• feat: start an autodiff poc. by @paquiteau in #82
• Gpunufft data consistency by @paquiteau in #97
• Added siemens data reader and phase shifter by @chaithyagr in #89

Full Changelog: v0.3.0...v0.8.0