examples needed in docs and readme for seeg-esque functions

[geryan]

• assign_nearest_land
• nearest_land
• inside_mask

[geryan]

> devtools::document()
ℹ Updating sdmtools documentation
ℹ Loading sdmtools
✖ assign_nearest_land.R:8: @param requires two parts: an argument name
  and a description.
✖ assign_nearest_land.R:9: @param requires two parts: an argument name
  and a description.
✖ assign_nearest_land.R:10: @param requires two parts: an argument name
  and a description.
✖ assign_nearest_land.R:16: @examples requires a value.
✖ inside_mask.R:11: @param requires two parts: an argument name and a
  description.
✖ inside_mask.R:14: @return requires a value.
✖ inside_mask.R:17: @examples requires a value.
✖ nearest_land.R:6: @param requires two parts: an argument name and a
  description.
✖ nearest_land.R:7: @param requires two parts: an argument name and a
  description.
✖ nearest_land.R:13: @examples requires a value.

[dhduncan]

Thank you, will get onto it soon!

[geryan]

No rush, this is just spat out when I documented a different function