Merge pull request #5 from jknowles/master

Updates for caret 6.0 and reorganization for testthat
Update README
Update README
Merge branch 'master' of github.com:jknowles/caretEnsemble
update namespace and description
Merge pull request #9 from jknowles/Dev

Dev
Rebuilt package docs on master
Updated readme

Points to dev branch for install.
catching up to upstream
merge Dev with master