cx_OracleTools Code

Clean up a few properties.

Added preliminary setup.py to be used for building the cx_OracleTools package.

Migrate some code from DescribeObject in cx_OracleTools and some code from the
module to the Environment object in order to be able to use an exception class
instead of a string as well as consolidate some (potentially) commonly used
code.

Last changes made at Computronix.

Last public release.