The 'public' schema need not exist. Workaround for issue #4.
The 'public' schema need not exist. Workaround for issue #4.

 * pyrseas/dbconn.py (DbConnection.connect): If set search_path fails
   with public schema, try again without it.

dvarrazzo/Pyrseas,perseas/Pyrseas,reedstrm/Pyrseas,PJMODOS/Pyrseas