v0.3.0

CMBLensing v0.3.0

Diff since v0.2.1

Closed issues:

• passing operators to load_sim_dataset is delicate on v0.2.1 (#13)

Merged pull requests:

• add batched fields for better GPU usage (#11) (@marius311)
• Preliminary API for defining custom DataSets (#12) (@marius311)