Merge pull request #86 from ryban/pyparsing

Don't lock pyparsing to a specific version

setup.py

@@ -4,7 +4,7 @@
 from setuptools import setup
 from setuptools.command.test import test as TestCommand
 
-required_packages = ['pyparsing==2.1.1']
+required_packages = ['pyparsing>=2.0.3']
 if sys.version_info[:2] == (2, 6):
     required_packages.append('argparse')
     required_packages.append('ordereddict')