clarified "Bye for now!" message after Control + D command
slides: remove y-axis navigation
slides: remove significant trailing whitespace in code blocks
Update link to Quil capstone app
add `rest` example

In the step immediately following this in the outline, we refer to `rest` as something that was previously shown, however its not actually referred to before that point. This minor edit just adds a `rest` example. 

I'm unsure if this was an oversight or a deliberate choice, but it stuck out to me.
Merge pull request #114 from kpfell/clarify-bye-message

clarified "Bye for now!" message after Control + D command
Merge pull request #108 from davidchambers/linear

slides: remove y-axis navigation
Merge pull request #109 from davidchambers/pre

slides: remove significant trailing whitespace in code blocks
Merge pull request #116 from kerrizor/patch-1

add `rest` example