Handle ratelimits

[halfpastfouram]

It is possible that a script has so many things to do that there must be a lot of communication with the reddit api. Only 60 requests per minute are allowed by the reddit api.

The reddit api sends response headers with information about the amount of requests per minute:

Response header	Description
X-Ratelimit-Used	Approximate number of requests used in this period
X-Ratelimit-Remaining	Approximate number of requests left to use
X-Ratelimit-Reset	Approximate number of seconds to end of period

These response headers should be used by the API to handle the ratelimit correctly.