Subject fixed column names handling and server warnings
Author Roman Rokytskyy
Hi,

I have fixed bug in column names handling as we agreed before:

1. strip double quotes from column name if present.

2. perform case-sensitive search in column names and aliases and
return position if found.

3. if name contained double quotes, throw exception that no column
was found. we assume that person passing column name in double quotes
knows what he's doing.

4. perform case-insensitive search

5. throw an exception if previous step found nothing.

Also I added support of server warnings. Now they are added as
SQLWarning to a connection warnings.

Please update your sources.

Best regards,
Roman Rokytskyy