Vernier LabPro support added to PythonLabTools!

PythonLabTools now has a module which implements support for much of the functionality of the Vernier LabPro data acquisition module (see www.vernier.com for lots of information on this very useful, low-cost data acquisition unit). The module supports ascii and binary data transfers, serial communications at either 38.4k or 115.2kbaud, analog and digital input and output, and other useful things. It is only a week old now, so I am still adding at a high rate. It is in the cvs repository under data_acquisition/LabPro.py.