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At this point this module is stable (both AET & AET Insert) when tested in my local environment.
I moved the AET Insert into its own folder and made some changes to the db querying, the update function should fix it but just in case you should manually recheck that the fields are using AET Insert.
All the field handlers that entity API offers are now available in this project. This means entities referenced by entityreference or similar can be rendered etc. I expect Views created with this release will not break in the future but I am not yet entirely sure so I am not releasing this as beta yet. I will add more tests and release the first beta once we have more complete coverage. Especially field API fields with multiple columns need much more through testing.