Fixed some formattig issues.
Fixed issue with clicking start twice. This involved a simple check to see if start was set
There are a lot of changes here but most are explained in the corresponding comments. Basically I changed the onClick methods to be event listeners. Look into them because there are a TON of them and they are all super awesome.
Merge branch 'no_animate' of https://github.com/anjartsi/2-D_Kinematics into no_animate