Added main window icon
ToolContextual: Fixed bug where selecting items would activate them
Flip-flops now model the delay between setting the input and output.
This fixes simulation errors which prevented stuff like shift registers
from working.  The change is backwards compatible with older saves.
Toolbox: Added 1-to-2 decoder
FlipFlop: Removed redundant code
GraphicGen: Decoder is now smaller, and only grows when needed
Updated example save files