Ziggurat-foundations

* replace cryptacular with passlib


2015-09-19
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* some fixes for ext.pyramid not-working completly with service related changes

2015-08-03
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* models are decoupled from services that interact with models
(all model querying methods now live in services)

**BACKWARDS INCOMPATIBLE CHANGES**

* import related changes:
* ziggurat_foundations.models doesn't import all the models anymore
every model now lives in separate file
* permission related functions now live in permissions module


2015-06-15
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* user model gains security date column
* minor bugfixes

2015-06-07
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* added persist(), delete(), base_query() methods to Base model

2015-04-27
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* resource.groups_for_perm() returns groups/permissions for single resource

2015-04-24
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