Start on concurrent get.
WIP, untested.
Working. Needs cleanup.
Change default concurrency, timeouts, attempts.
Change some timeouts.
Don't need to close channels.
WIP: start rework buffer pooling
WIP. Move to leaky buffer.
Memory profiling.
Version used for benchmarking.
Clean up.
Start on new API.
Add signing code.
Working with new api.
Add putter code, buffer pooling, move some code to utility funcs.
Update cli.