Added driver map getter
Made driver getter return only the driver names
Portability wrapper did not properly use the _defaultFetchMode when the method setFetchMode() was used on the Connection
Removed leading underscore of private property _defaultFetchMode because of changed visibility
Added regression test for the Portability Wrapper when setting the defaultFetchMode on the Connection instead of the Statement
Added support for namespace/schema quoting if it is a reserved keyword.
Merge pull request #357 from doctrine/PgSqlSchemaFix

Added support for namespace/schema quoting if it is a reserved keyword.
Reverted fix to PgSQL.
Fixing wrong method name.
Merge pull request #348 from mdriessen/fetch_portability

Portability wrapper _defaultFetchMode
Merge pull request #340 from stefk/driver-map-getter

Added driver map getter