Write more documentation as vignettes

[Guillawme]

Latest vignette todo list:

• [ ] Tutorials for a basic use case:
  • [x] FRET: inspection of raw data, detection of outliers, averaging, correction, curve fitting, figure making.
  • [ ] FRET: Job plot.
  • [ ] FP: processing and analysis.
• [ ] Using different equations.
• [ ] Derivation of the equations:
  • [x] Hyperbolic
  • [x] Quadratic
  • [ ] Hill
• [x] FRET experimental set up.
• [ ] FRET Job plot experimental set up.
• [ ] FP experimental set up.
• [ ] Physical principle of FRET (maybe simply list relevant references).
• [ ] Physical principle of FP (maybe simply list relevant references).
• [ ] How to extend the package:
  • [ ] Add a new equation.
  • [ ] Add a new processing pipeline.