add versioneer

Author: Josef-MrBeam

.gitattributes

@@ -0,0 +1 @@
+octoprint_netconnectd/__version.py export-subst

MANIFEST.in

@@ -4,3 +4,5 @@ recursive-include octoprint_netconnectd/translations *
 include LICENSE
 include requirements.txt
 include README.md
+include versioneer.py
+include octoprint_netconnectd/__version.py

octoprint_netconnectd/__init__.py

@@ -374,3 +374,7 @@ def __plugin_load__():
     global __plugin_implementation__
     __plugin_implementation__ = NetconnectdSettingsPlugin()
     return True
+
+from .__version import get_versions
+__version__ = get_versions()['version']
+del get_versions