Release python-sybase 0.39pre1 available

This is a pre-release for Sybase 0.39pre1 with the following major changes:

* Added type mapping as proposed in http://www.uniqsys.com/~carsten/typemap.html by Carsten Haese
* Handle engineer notation of numbers in numeric
* Added support for CS_DATE_TYPE
* Added support for python Decimal objects in databuf
* Possibility to use ct_cursor for some requests
* Refactoring - merged Fetchers, CTCursor and CmdCursor in Cursor
* Refactored _cancel_cmd
* Added a prepare method to Cursor
* Additional 'locale' argument to connect and Connection to set the locale of the connection thanks to patch by Harri Pasanen
* Better compliance with DBAPI: returns None in nextset when no more set
* Added conversion from string to int when assigning to a CS_INT_TYPE DataBuf