Update links chromebook -> cloudbased

[LucyMcGowan]

I am updating the text to replace all "Chromebook" with "Cloud-based"

I don't want to break the links, so this is a reminder to change these once they're live

http://jhudatascience.org/chromebookdatascience -> http://jhudatascience.org/cloudbaseddatascience

[ShanEllis]

Just a note....mostly to myself: leaving this one open intentionally because I have to make substantial edits to 03_internet (since we used content on old website in lesson)