* addressed comments in the PR about parameters in check_array
* update the test case for the evaluation of estimators with pandas series
* bug fix, need to check for *not* None explicitly
* updated with isinstance check if the documentation says there is acceptance of floats
* ran pep8 linter on modified files
* moving the test case to estimators_check
* add a predict function into the testing pandas.Series class
* avoid running anything beyond the newly added meta checks
* check if pandas is installed before running the specific test
* changed the order of the try-catch to check for sample_weight param beforehand
* pass on import error rather than printing something to std out
* improve test case naming and pd.Series check in the bad estimator class
* address a pep8 linter error with unused import
* pep8 warning disabled for potential unused import
* throw a warning when SkipTest is raised
* add a SkipTestWarning
* updated the whats_new.rst with this issue
* rebase and fix a spacing issue
Wes Barnett
Hanmin Qin