importlib does not exist on Python 2.6. Use Django version.
Merge pull request #327 from elasticsales/pickle-error

Document is not picklable before it is saved
Fixed pickle unsaved document regression (#327)
Merge pull request #326 from mitar/importlib-python26

importlib does not exist on Python 2.6. Use Django version.
Updated Changelog
Version bump
Merge branch 'master' of github.com:MongoEngine/mongoengine
Updated requirements for test suite
Fixing django tests for py 2.6
unique_case_insensitive attribute
removing the 'feature' that you couldn't AND queries together using the same field constraints.  For example qs.filter(x=1) qs.filter(x=2).
Dummy commit.
allow for duplicate AND'd queries and skip the tests that assume it's not possible