Fixed NameError when creating received CAN message

Added deprecation message to xml2tdv.py

Updated ReadCAN.py and can_logger.py to work with new CAN.py

canlib.py: added constants for acceptance filter types (standard/exte…

…nded messages)

canstat.py: added canNOTIFY_ALL flag (combination of all other canNOTIFY_x flags)

Merge after pull from version 0.2.3

Added basic IPython support to pycanlib (ReadCAN and PrintCAN)

can_logger.py now creates its output directory if it doesn't exist al…

…ready

Filter criteria now appear as the first child of a MessageList element in an XML log

Merge after pull from old version

CAN.py: All objects that may be added to an XML log file are now subc…

…lasses of the XMLObject class, which contains the to_xml() method

	Finished adding class and method docstrings
canlib.py: Added docstrings
canstat.py: Added docstrings

can_logger.py now generates an XML file containing the traffic logged…

… and other information about the system doing the logging

CAN.Message, CAN.LogMessage, CAN.InfoMessage and CAN.ChannelInfo objects can all now produce XML representations of themselves
Added MachineInfo class to replace the dictionary that was previously returned by GetMachineInfo (this has an XML representation also)
GetCANLIBInfo no longer adds a minor version letter to the end of the CANLIB version identifier if the value of this character returned from canGetVersionEx is 0