Merge branch 'release/0.8' into develop

* release/0.8:
  Prepare v0.8
roxygenise new arg for PlotRasterFromSweeps
Merge branch 'master' into develop

* master:
  roxygenise new arg for PlotRasterFromSweeps
  Teach PlotRasterFromSweeps to colour dividers as specified by user
  Bump version to 0.8.1
  Fix bug in PlotRasterFromSweeps docs
  Bump version for development
  update to roxygen2 v4
  Pass on other arguments passed to smpsth
Add lifetime_sparseness
Fix example for lifetime_sparseness

* and tidy up code
Merge branch 'feature/lifetime_sparseness' into develop

* feature/lifetime_sparseness:
  Fix example for lifetime_sparseness
  Add lifetime_sparseness
Prepare 0.8-2
Merge branch 'release/0.8-2'

* release/0.8-2:
  Prepare 0.8-2
  Fix example for lifetime_sparseness
  Add lifetime_sparseness