Add Looper images, tables for Looper rec vs play buttons, shorten 'Basic Overview'

[nrichards]

Overall, focusing on the Looper

Changes

• Various clarifications: capitalizations, regular word-use, add links, formatting, chop up long paragraphs into smaller pieces, heading level grouping for Looper, extract tabular info from sentence
• More 'workflow:' usage, update "tutorial:" for Buckets
• Add "Control surface" as a feature of Qun. It is a device with intentional limitations. I am trying to start adding talk about how limitations are GREAT things, for expressivity's sake.

~OPEN QUESTIONS~ Not fixing

• ~[FOUND ISSUE]: document claims that "when you press rec + looper play twice", something happens ... it does not happen. So this may be a bug in the doc. Need to ask about that.~

Examples

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