Datasets coordinates beyond Cartesian and uniform

[pzhanggit]

Spherical coordinate

• convrsg
• [ ]

Polar coordinate

• planetswe

Log-spherical coordinates

• postneutronstarmerger

Others

• rayleighbenard: non-uniform along the y-axis
• rayleightaylor: varying time steps
• supernova64, supernova128, turbgravcool, turbradlayer2D, turbradlayer3D: variable time steps