Crate rate_limit

rate_limit

This is a simple token-butcket style rate limiter

It provides neat features like an estimate of the next block

and possible inverse of the bucket (filling vs draining)

this provides both thread-safe and non-thread-safe versions

Structs

SyncLimiter	SyncLimiter is a simple token bucket-style rate limiter
UnsyncLimiter	UnsyncLimiter is a simple token bucket-style rate limiter (cheaper to clone, but not thread safe)