Updated UI + Functions

v1.1

• Added 4 new directional buttons.
• Updated window caption to specify when the current project has been edited (denoted by a *) and will ask if you'd like to save current project when loading, or making a new project.
• Added a drag+spin function to the model as well as buttons for fine-tuning the angle of the model you're working on. Holding shift while hitting +/- will add or subtract 5 degrees instead of the usual 1 degree.
• Shift-clicking the working palette with LMB/RMB will now change the color of the workplace grid squares
• Right-clicking the auto-rotate button will reverse the rotation direction.