* add default logging NullHandler
* fix indentation mismatch
* rename control to calls to better point out its purpose
* rename class to EjabberdApiCalls to better point out it purpose
* changed get_nodes to an internal support method
* fix version string being empty
+ add error code 17 to the README
resolves#2
Error Code 17 means one of two things
a) the configured user credentials are not correct, therefore the user is not able to properly login
b) the configured user does not have the correct permissions to interact with the api
* split up api and metrics class
* revamped file nameming to better resemble their function
* update prometheus and influx files
* fixed version regex to not break on - in version string