bump version to 1.6

Author: stefankoegl

jsonpointer.py

@@ -41,7 +41,7 @@
 
 # Will be parsed by setup.py to determine package metadata
 __author__ = 'Stefan Kögl <stefan@skoegl.net>'
-__version__ = '1.5'
+__version__ = '1.6'
 __website__ = 'https://github.com/stefankoegl/python-json-pointer'
 __license__ = 'Modified BSD License'