Updates to address the archiving of SDMTools. This packaged is moved …

…to suggests, tests that use it are skipped if it is not installed

Updates to accommadate Roxygen2 7.0.0

CRAN: Address issue with author names

Merge pull request #300 from AugustT/master

various improvements

Merge pull request #226 from AugustT/master

Version 0.4.21 - On CRAN

Merge pull request #129 from goldingn/master

changing maintainer name to apply winbuilder for new tagged version

Merge pull request #73 from goldingn/master

inline with modules, and tied to a specific version, ready to be tagged

Fix anopheles module name in readme and umlauts.