Future software improvements

[securelyfitz]

• [x] full review of each file adding comments
• [ ] clean up file locations - /lib/ vs /, merge assets & data?
• [ ] add images for each card
• [ ] add images to sponsor display
• [ ] polish username entry
• [ ] separate all strings possible into separate files for no-code customization
• [ ] auto-advance sponsor display?
• [ ] 'about' page on settings?
• [ ] add clues received to alibi list
• [ ] implement game controller (#27)
• [ ] improve flashing script (#26)
• [ ] implement sleep (#15)
• [ ] add crypto (#4)