Merge pull request #1 from seankross/master

Fixed typos
Added lots of stuff, edits to clocking, and diagrams for clock divider
and cpu clock generation.
Merge branch 'master' of github.com:rohit507/UMD-CMSC498a-Intro-to-ESD
More diagrams, tinier todos, and more work on the clocking chapter
Added lots of stuff to the timing chapter
Split Clocking and timers into 2 seperate chapters
Added a lot to the timer section including a few graphics.