Basic couchdb support

[gaubej]

For my project, I use CouchDB database. So I had to work with FOSOAuthBundle and CouchDB. I've use MongoDB Document and just edit existant couchdb model.

I still have some problem to verify client credentials using FindOneBy because CouchDB don't find my Id this way. So I had to search using juste secret then verify my id.

This is my first contribution so I wait for your advice and feedback.

[gaubej]

Can I have some update about this ? This is very important if we want to use Couchdb 2.0 as database.

[gaubej]

Sorry for that, I have commited corrections

[GSokol]

Now cool waiting for acceptance too!

[gaubej]

Can this be integrate ? Can someone accept this ? Is there any problem ?

[dinamic]

There are a few conflicts. Maybe you can rebase on top of master.

@dkarlovi should be able to get this merged.

[dkarlovi]

@gaubej is this obsoleted by #524? If so, please close it and we can work on this there.