* redesign:
  Remove TMP old files
  Add extra tests
  Add lunSimulate tests and run checks
  Add lunSimulate function
  Add lunEstimate function
  Add LunParams object
  Add splatSimulate tests and run checks
  Rename estimation functions
  Modify splatSimulate to use SplatParams
  Add estimateSplatParams and helpers functions
  Add setParamsUnchecked method
  Add splatParams object
  Run checks
  Document new simple simulation
  Add estimateSimpleParams function
  Temporaily move old files
  Modify simSimple to use SimpleParams and rename
  Add S4 SimpleParams class