Options for real-time data and text labels for CPU and Memory

* Large change to CPU viewing, now compares previously recorded CPU usage, which shows what CPU is working at the moment, as opposed to a look over time.
* Added CSS transitions to .bar-section which is very noticeable for the CPU.
* Added text labels for CPU and Memory, so you can see how much memory is being used, or what percentage of the CPU is being used for certain tasks.
* Labels are zero-padded for CPU to prevent the width jumping around.