Decrease test duration
Add freshwater data
Introduce dataset versions, fix citations
Fix authors
New datasets (ENVIREM, WorldClim paleo and future) Added functions related to correlations
Remove usage of ~/R/sdmpredictors from tests
Fix url in description
Fix urls in description and readme
Datadir is mandatory now, instead of automatically writing to ~/R/sdmpredictors.
Initial release of the sdmpredictors package.