Python 3 compatibility

[Idus]

I was just asked by OctoPrint today to do a Python 3 test (there is a new app for that) and report an issue to all plugin githubs that were found incompatible with Python 3 (if not already such an issue was stated).
Did the test and got back that the your plugin was Incompatible with Python 3 and could not find any other open issue about it - so here it is. :)

Cheers

[b-morgan]

In addition, this issue also serves as a test to see if this plugin has been abandoned. Alternatively, would you like to put this plugin up for adoption?

[nxvash]

i'm guessing by lack of response that this has been abandoned :/

[benjamin-salchow]

well i made a pull request therefore a while ago - but it wasn't merged yet: #28
I run this plug-in with python 3 for months.