Add detection for not enough space

[cabrador]

As found in #917 when disk containing Carmen runs out of space, database ends up corrupted.
We needs to be done:

1. Add detection when disk could run out of space
2. Stop the app so that database does not end up corrupted
3. Raise an error and inform user about this

[kjezek]

I think it should be responsibility of the client, how can the database stop the client and inform the user?

[cabrador]

I was thinking about returning an error at some point

[cabrador]

Check write buffer error on EndTransaction should solve this.