Remove machine arg, as it is not necessary. Closes #17
Merge pull request #18 from piyushk/remove_machine_arg

Remove machine arg, as it is not necessary. Closes #17
update changelog
0.2.0
Force device_id to string type

device_id might look like an integer. in that case, getParam()
doesn't want to parse the param as a string for some reason (not
sure if this is by design).

This patch works around that issue.