Displays time realtime, ability to jump around in time

Time is now displayed in top left corner of the window. It changes to accommodate for fast forwarding and for jumping in time.
Note that currently, time is an arbitrary number that starts at 0 when the simulation starts

The user is now able to jump to a certain point in time using the text input box and the "jump!" button underneath it. The user needs to enter the time they want to go to in the input box and press jump.
Note that this feature only works with positive values of time.

If the objects don't seem like they are moving it might be because they are moving too slowly to see, try fast forwarding to see motion.

Thanks!

The reason why initalVelo is always (0,0,0,1) is that we want to see the change in velocity and the change in position from time=0 so that when I say go to time=x no matter where in the simulation I am, I will go to the same time=x velocity and position since it is always relative to the start rather than where in the simulation you are. Note that as the particles accelerate, the velocity does increase, but they all currently start at velo=0
Does that seem like it would work/make sense?

We might be looking into changing the initial velocity for some objects since everything starting at velo=0 isn't completely realistic but we haven't implemented that yet.