Update devicetypes.md I made a ton of changes here. I think this page needed a huge revamp. I made paragraphs read more clearly, remove jargon, process sentences for real application. Removed odd phrasing and tried to bring back the original intention of the paragraphs. Some areas didn't have good connection to the section subject and needed help. Added stylistic spacing to bullet points so they can be easier on the eyes. I stopped at the tablet example.