Bump dependencies to stable version with Python 3 / Django 1.7 support

Author: vdboor

setup.py

@@ -42,9 +42,9 @@ def find_version(*parts):
  license='Apache 2.0',
 
  install_requires=[
- 'django-polymorphic>=0.5.5',
+ 'django-polymorphic>=0.6', # ensure Django 1.7 compatibility
  'django-mptt>=0.6.0',
- 'django-tag-parser>=2.0b1',
+ 'django-tag-parser>=2.0',
  'future>=0.12.2',
  ],
  requires=[