changed assembled function for cross DB function concatenation
added Model.object.raw() tests
RawQuerySet fix
 in this implementation, in raw query you don't need to add the primary pk, because is a composite pk, and if you do, it will be ignored.

 original issue 11
 raw()-queries require id=MultiFieldPK() to be after all other fields
(thanks to soulne4ny)
Creation SQL
PRIMARY KEY = (..)
FOREIGN KEY (..) REFERES TABLE (..)

and pendings_reference for the self relationships.
 + added a model in the testprj for this case Authors.friends m2m->self
Merge pull request #12 from simone/sqlconcat

Sqlconcat
from compositekey import __future__
support API described in ticket #373
from compositekey import __future__
support for Europython 2012 API for CompositeField
support for Europython 2012 API for CompositeField
fix m2m
https://github.com/simone/django-compositekey/issues/15
Merge pull request #17 from soulne4ny/master

added Model.object.raw() tests
added submodule to django_src (branch 1.4.x)
Added Makefile and updated documentation.

The documentation explains how to setup a test environment. The Makefile helps
to run the django-compositekey test suite.
Added missing --editable to "pip install" commands.
Added *.egg-info.
Merge pull request #18 from inqbus-gmbh/makefile

Added Makefile and updated documentation.
compatibility with linux and mac Makefile ls -1
checkout django 1.4.6-dev
help text for the Makefile (thanks to keimlink)
starting to develop the django-compositekey 1.5 version