Update version 0.7.0 -> 0.7.1

Fixes
-----
* Remove dwave-networkx version upper bound to resolve version conflicts

Author: arcondello

dwave/system/package_info.py

@@ -15,7 +15,7 @@
 # ================================================================================================
 __all__ = ['__version__', '__author__', '__authoremail__', '__description__']
 
-__version__ = '0.7.0'
+__version__ = '0.7.1'
 __author__ = 'D-Wave Systems Inc.'
 __authoremail__ = '[email protected]'
 __description__ = 'All things D-Wave System.'