Save function

[festen]

Added save/load function

When save functionality is enabled:

• saves/Suspeneded.canvas will be saved every 1000 iterations or when stop button is clicked
• saves/{100, 200 ... inf}K.canvas will be saved every 100.000 iterations

When load functionality is enabled

• will start by loading saves/Suspended.canvas

When both enabled this effectively gives you the function to pause execution (as it will be saved on stop and loaded on start!)

[alexwalterbos]

Awesome! I'm going to try this, if it works I'll merge it.