Merge branch 'master' into develop
mongo doesn't support long collection or index names
Docs: Added "Setup" topic to site header

Thanks to @Psycojoker for the report and patch.

Closes #96, #95 and #94.
Adapt compiler to djangotoolbox's new ordering interface

See django-nonrel/djangotoolbox#6
Merge pull request #99 from django-nonrel/feature/refactor-ordering

Adapt compiler to djangotoolbox's new ordering interface

https://github.com/django-nonrel/djangotoolbox/commit/bd292d69c45d93ca87885af86ee38ecf56a34043
Added ListField vs. admin to troubleshooting page
Merge branch 'hotfix/pkchain' into develop
Fix tests imports and withs for Python 2.5.
Merge branch 'master' into develop
PEPification, style normalization and trivial cleanup.
Adapt to new data types.
Adapt to toolbox leaving AutoField conversions for back-ends.
Field for the filter argument is now available in add_filter.
Adapt to fields rather than columns being passed to the insert method; move save handling code to one place.
Implemented db_type logic that does not rely on the related_db_type framework.
Moved and simplified database conversions by making use of parent handling of nonrel fields. Dates and times are converted on the same level; safe calls are replaced with direct reraising of the PyMongo's InvalidId exception as Django's DatabaseErrors (was issue #7); a NOT_PROVIDED check is dropped in the deconversion code that might break something and could use further analysis. Fixes #47.
NonrelCompiler now passes all new key values through database deconversion.
Drop no longer used database features.
LegacyEmbeddedModelField now lives in toolbox and can be used to avoid proper conversion/deconversion of embedded fields' values that might not be backwards compatible in some rather specific scenerios. Old usage (compatiblity with pre-0.2 Mongo engine data) is currently preserved, but pending removal.
Fixed capped collection support + tests