Added LICENSE and brief readme
Updated network checking with more specifics to Salad Simple Storage.
The access token is now fetched, checkpoint size is checked before
uploading and checkpoints are read from the inputs folder to ease file
management on workflow dispatch
When sampling occurs, intermediate steps are cached to disk.
If at any point execution is halted, interrupted, or crashes, these
checkpoints are loaded from to restore execution from the previous step
Currently largely proof of concept. All samplers will cache, but
restoring is only applied to CustomSampler. Boilerplate is largely in
place to allow for caching output of other non-sampling nodes and will
be investigated later.