Documentation.
Merge branch 'staging' of github.com:chefjerome/graphalchemy into staging
Updated fixtures.
Drafted OGM.
Add support for edge creation.
Use model-aware queries.
Pass a path to the models.
Bug fix.
Rename properties when they are aliased or prefixed.
Lazy-load session.
Added close method.
Merge pull request #29 from adurieux/staging

Improved APIs.