backward compatibility updates. Do not check for concurrency if `0` is passed as version value
    (ie. no value provided by the form)
bump 0.7.1
Merge branch 'heads/0.7' into develop

* heads/0.7:
  bump 0.7.1
  backward compatibility updates. Do not check for concurrency if `0` is passed as version value     (ie. no value provided by the form)

Conflicts:
	CHANGES
	concurrency/__init__.py
removes python 3.3 from travis
[requires.io] dependency update
[requires.io] dependency update
Merge pull request #31 from saxix/requires-io-develop

[requires.io] dependency update on develop branch
[requires.io] dependency update
Update install.rst

Adjusting note regarding ```INSTALLED_APPS```; |concurrency| must be added to ```INSTALLED_APPS``` if you want access to the templatetags.
Merge pull request #32 from saxix/requires-io-develop

[requires.io] dependency update on develop branch
Merge pull request #33 from daaray/patch-1

Update install.rst
fixes minor issue in Makefile that prevents tests to run
updates gitignore
fixes test. wrong decorator stops to work after 1.7
remove sample-data=utils dependency
drop suppport for python 3.2
Merge branch 'develop' of https://github.com/saxix/django-concurrency into develop

* 'develop' of https://github.com/saxix/django-concurrency:
  remove sample-data=utils dependency
updates travis config. removed old unised matrix
updates gitignore
updates README