Updated todos
Moved makePredObsMatrix to helper functions

Also:
checkModels_extractTypes
extractBestPreds
checkPreds
makePredObsMatrix

These functions are used by caretList AND caretEnsemble, so it makes
sense to store them here.
check functions stubs

Should these be called “check” or “validate”?
checkModels_extractTypes split

into checkModelClasses and extractModelTypes
Rebuilt docs
Implemented all checks but check_bestpreds_indexes
Named components
Added tests for checks
Added check_bestpreds_preds check
Finalized tests
Fixed stupid error
version number bump
Rebuilt vignette
More explicit errors

And more checks
Merge pull request #106 from zachmayer/check-functions

Check functions