Change README LCM-LoRA example learning rates to 1e-4.
* Fix SD scripts - there are only 2 items per batch * Adjustments to make the SDXL scripts work with other datasets * Use public webdataset dataset for examples * make style * Minor tweaks to the readmes. * Stress that the database is illustrative.
* add lcm scripts * Co-authored-by: dgu8957@gmail.com