commit changes
updated docs
0.5beta
python 3.x compatibility
fixes #9
fixes travis config to skip test if django 1.4.5 and python 3.x
fixes travis config to skip test if django 1.4.5 and python 3.x (again)
uses matrix/exclude in travis.yml to bypass python 3.2/django1.5x
fixes mistake in travis.yml
another attempt to work with travis matrix
partally Revert "fixes travis config to skip test if django 1.4.5 and python 3.x (again)"

This reverts commit b279972d001924c1fea1607af8446d0f34619186.

Conflicts:

	.travis.yml
updated travis config
fixes wrong deprecation message that confuse concurrency_check/apply_concurrency_check

- removed use of core.* functions in tests
- updates documentation
moves wrapping call into contribute_to_class to raise
the ability of wrapping Models (thanks Li)
moves wrapping call into contribute_to_class to raise
the ability of wrapping Models (thanks Li)
Merge branch 'release/0.5b1'
Merge branch 'release/0.5b1' into develop
bump 0.5
Merge branch 'release/0.5'