[doc] Revised datamodel, initial UML
[doc] First description of new datamodel
[doc] New architecture considerations
[doc] Reviewed and revamped core datamodel
[doc] Added auth and search data models, minor tweaks to core model
[doc] Finalised architecture
[doc] Initial event data model
[doc] Tweaks to core and search models
Merge pull request #30 from commonsmachinery/datamodel

Description of new architecture and data model