Merge pull request #2 from nuest/master

Initial import of package and some minor fixes
Update README.md
- moved changes from Friday (stop on empty querries)
- add roxygen example to help page of importEnviroCar
Update README.md
Update README.md
Merge branch 'master' of https://github.com/enviroCar/enviroCaR
update documentation, extend author list
update to roxygen2 version 4.0.0 (no changes but the comment about automatic generation)