update docs and bump to 0.1.6

pyotrs/version.py

@@ -4,5 +4,5 @@
 # 3) we can import it into your module module
 """
 
-__version_info__ = ('0', '1', '5')
+__version_info__ = ('0', '1', '6')
 __version__ = '.'.join(__version_info__)