added load file and save file functionality and the corresponding act…

…ions to the File menu; added gitignore file; added regression directory and some test assembly files for later regression testing

simpler, more accurate error handling for settings

Added a splitter to the main window for easy resizing of the timing t…

…able

Fixed a bug with execution start time of store instructions; Code cle…

…anup and refactorings; Updated README and animated gif

Updated the README and animated image

name fixes

name fixes

name fixes

Changed the simulator image to animated gif