Alterations to get performance comparison with redux version

Start app with monkey shape as a better introduction

Initial Redux usage for parts of the toolbox

Allow file dropping anywhere in the window, improved styling of message

Set up webpack to build SCSS and JS, Started on prettier UI and using React

Previous obtimisation carried over to progressive surface strategy

Faster and more accurate Z tool position on surface strategy

Sub-millimeter resolution

Optimisation slicing for surfacing strategy

Fix for changing down to smaller tool/resolution

Made other strategies object oriented, Added minimal UI for changing strategy, resolution and tool diameter

Optimise the path by removing points that are along a straight line

Optimised slice strategy by only doing collision detection on the part of the model on current layer, separated redraw from path generation which gives even more performance

Added multiple tool path strategies

Fixes to contouring paths, showing duration for measuring performance