#1 Arithmetic Condition Creation Bug Fix and General Updates

[mesheets]

This patch includes several modifications--
* Fixed bug preventing creation of arithmetic conditions (branch, loop) inside global event monitors
* Enabled use of non-USB IR towers by checking the RCXTTY environment variable before defaulting to USB
* Changed default file writes (e.g. config.txt, intermediate NQC code file) to occur under the user's directory to resolve permissions issues
* Updated check in Windows for whether to use command.com or cmd.exe
* Added a "Device" menu (for potential future enhancement; for now, is set to RCX2)
* Modularized some property values into an AppProperties class
* Changed window layout to increase the programming area; added UNSW CSE logo and URL to the about dialog

[mesheets]

Source Code Patch File (not including image and binary files)

[mesheets]

Updated src/icons/logos/about.png image to include UNSW logo

[mesheets]

Patch file updated....