Visual Test Shell for BACnet SVN

Changes to compile with VC++ 6 as well as newer versions

Scripting uses hashes of keywords, including object-type, property-ids etc. The precomputed values were several revisions behind. Changed to COMPUTE the hash tables for object-types, property-ID, abort and reject reason, services - the enumerations that are expected to change most frequently
Eliminate stPropIDs - use the StringTable version instead to reduce maintenance
Eliminate unused tables from StringTables.cpp
Make case and punctuation of strings in StringTables.cpp match 135-2008
Add reserved and extension counts to StringTable, to allow eventual replacement of the redundant etables

Clean up some leaks in EPICS object deletion

Fix error in RPM-Ack and ReadConditional-Ack if multiple objects

Changed Tom's new object literal strings to the conventional
CharacterString
BitString
OctetString
DateTime
with medial capital for String and Time in DateTime.

Show error if there are unparsed bytes at the end of an APDU
Let Add and RemoveList cope with propertyIDs above 255

- Replace unsafe char* parameter in BACnet Encode(char*) with Encode(CString&)
- eliminate heap crash due to to lack of copy constructor in WPM dialog (as invoked from EPICS viewer. Did you know it could do that?)
- remove "const int" defs for sizeof various classes. Not used, and scary to think how they might be...
- various small cleanup (sorry, I waited too long to check in, and things got intertwined)

Added decoding in BACnet sniffer for Characterstring, Integer, and (particularly) DateTime Value objects.

Included the DateTime object's create function.
Added icons for the new object types (or at least placeholders) for the Epics Tree view.

Updated the new Object names, correcting 37 and 38.
Re-designed the constructors for EPICS Objects to avoid endless duplication of code, adding handling for generic properties and also common properties (of fixed value).
Provided constructors for Characterstring, Integer, and DateTime Value objects.
Provided a generic default constructor for the other new Object types, until someone is willing to improve them.
Got fed up with some persistent warnings and so tamped them down with appropriate casts.