ggOceanMaps 1.4 (development version)

Fixed a bug with shapefiles argument shortcut.
Fixed a bug in ices_data
Add sf support for clip_shapefile
Add sf support for shapefiles (converts to sp, needs to be refined)
Fix a bug with expanded limits in decimal degree projection
Fix a bug where shapefile_list("all") would retunr multiple rows per shapefile name.

ggOceanMaps 1.3.4

Added shapefiles to the x argument shortcut in basemap().
Added limits to premade shapefiles to make visualization easier.
Removed many CRS warning from sp and rgdal
Added a way to control the plotting order of graticules
Added transparency (alpha) scaling to bathymetry fill
Added GEBCO bathymetry which is more detailed than the ArcticSterographic.
Added EMODnet bathymetry which is more detailed than GEBCO for the Northeast Atlantic
Improved vignette and webpage:
- Added a way to control the plotting order of graticules.
- New design
- Added vignettes
Added ICES and Norwegian directorate of fisheries areas.

added x argument to basemap() and qmap()
Conversion from PROJ4 to PROJ6. This change will make the old ggOceanMapsData files incompatible with ggOceanMaps 1.2 and vice versa. Changed most functions.
Added NEWS.md
Improved premade_shapefiles and shapefile documentation.
Started rewriting the package from sp, rgeos and rgdal to sf.
Moved the rgdal package from Imports to Suggests.
Added geonorge_bathymetry()
Added the possiblity to adjust data limits using the expand.factor parameter in basemap() and qmap()
Improved the user manual and website.
Fixed an issue with other than decimal degree input rasters in raster_bathymetry()
Fixed an issue with ggplot2 (>=3.3.4)

Started replacing the PROJ4 system by the PROJ6 wkt based system by replacing "+init=epsg:NNNN" strings by "EPSG:NNNN". Did not finish the conversion.

First CRAN release. Contains the core of the package code rewritten from PlotSvalbard