Rewrite tests to pure pytest. Python2.6 support is fixed. Some cleanup towards python3
updated travis.yml the install is not even needed
tox integration added
tox integration added
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Add missing Mapping protocol methods
Change model comparison
Small refactor to group Mapping methods
fix for python 2.6
Merge branch 'nKey-model-mapping' into development
Fixed merged conflicts from olegpidsadnyi
Fixed merge conflict by updating test into the new test format
Updated history file
v0.9.3!
remove debug