Visual Test Shell for BACnet SVN

Add images for new object types, plus some growing room

Fix bug that crashed on proprietary object type 128: had <= instead of < etc.
Fix problems in the bitmap used for EPICS image list
- had wrong background color for newer icons, so they didn't come out transparent
- a few of the most recent icons were only 17 instead of 18 pixels wide, leading to skew
- added an icon for proprietary object types
- added space for two more "top level" icons for future expansion
- added test code to view all the icons (disabled as checked in)
- CAUTION: epicstree.psd is now obsolete: I can't edit it. Should be either updated or removed from svn

Corrected the list of properties added by the real Appendix j, and their associated strings.
Fixed some of the template types used in CreateCommonProperty().
Increased the object_name allocation in generic_object from 32 to 64 chars.
Filled out a few more icons for the EPICS tree view.

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

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

Make script execution termination terminate ALL steps.
Make script execution terminate without crash when script edit or app is closed.
Rename "halt" to "suspend", and "kill" to "terminate" on menus to reduce ambiguity.
Revise toolbar butoons for suspend/terminate/step

Added Find and Find-next buttons

Added new object icons.

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