add xy argument to as_tibble
fix missing vignette knitr reference
new oisst data set
bufext made defunct
added index extent functions index_extent and cellsFromExtent
removed decimate function
fixed unnecessary lapply call for the points case, so that is now not slow
extra handling for as_tibble, value is now optional so that data-less rasters can be used to build cell and dimension indices
new vignette stub to list all relevant raster functions
object_ is now integer, 1-based to match the rows in query
removed boundary (see romsboundary in angstroms)
consolidated on the central tools, removed experiments
migrated the buffer extent logic to spex, deprecated bufext
added as_tibble for rasters
added boundary function
new data sets rastercano and polycano
new functions decimate, cellnumbers and bufext
Added a NEWS.md file to track changes to the package.