Fixes UUID: UUID's are 36 Chars long, not 12...
The current implementation won't work against databases other than sqlite3 since the model had an issue with uuid's (they are 36 chars long)
Sqlite won't fail since there are no varchars only strings without a length.
Merge pull request #276 from envisia/bugfixes

Fixes UUID: UUID's are 36 Chars long, not 12...