Correct technical explanation for what p format specifier prints

[sb1752]

• Provides a more accurate description of what the format specifier, p is printing. From my understanding this is the address of the heap location, and not the address of the pointer structure itself. This is why if you print the vec and the two slices, they will all return the same memory address. This is also why the memory address consistently updates by 4 after reading 4 bytes.
• Included another diagram here to help visualize what is happening for mutable copy
• Updated the diagram for mutable reference

[edilmedeiros]

ACK d120ba0

The diagrams are a huge improvement.
I believe you can merge this. Then, I'll close #25 and submit minor editing if I find any typos on top of main.

[sb1752]

Awesome thanks