Python updated to use cDecimal Class and new ctsqlapi functions
Profiling analysis revealed ways that the Python driver could be made more efficient in handling numeric fields. Improvements that have been made include:
Using the cdecimal package when available.
Removing the _sqlnumeric class that stored the decimal in native format before conversion.
Mapped the new ctsqlGetNumericAsString and ctsqlSetNumericParameterAsString functions and used them to deal with numeric values.
