Implemented API rate limit of no more than five requests in ten seconds.
Fixed issue where config file parameter was being overwitten by ConfigParser object creation.
Added a logout() method.

Prevents stale sessions being left on the server when not using cookies.

Based on code by user gofetch (https://github.com/gofetch)
Merge pull request #9 from emjaytee404/logout

Added a logout() method.
Merge pull request #7 from emjaytee404/config-file

Config file parameter gets overwritten when creating ConfigParser object
Merge pull request #5 from emjaytee404/api-rate-limit

Implemented API rate limit of no more than five requests in ten seconds.