Remove useless $false variable
Simplify code to determine AutoExecute's return value
AutoExecute does not respect empty ResultSet in case of Update

Fixes #13
Use constants in switch statement
Whitespace
Update changelog
Fix AutoExecute behavior with empty result set

Pull request #15, issue #13
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mssqlnative: replace error_log() calls with ADOConnection::outp()

Fixes #12
Fix version match regex

There was a small mistake in the version matching regex introduced in
commit 30c21280a48680c079f825af6583793928d65cf5, causing the function to
trigger a system notice and only return 'V' instead of the actual
version number.

Fixes #16
postgres7: fix system warning in MetaColumns() with schema

When calling MetaColumns with schema.table, the driver triggers a
'Warning: sprintf(): Too few arguments' because the metaColumnsSQL1
statement contains one more parameter in 7 compared to the 6.4 version.

Resolved by adding a new protected _generateMetaColumnsSQL() method to
handle the preparation of the appropriate SQL statement, and overriding
it in the postgres7 driver.

http://phplens.com/lens/lensforum/msgs.php?id=19481