DOC: escape asterisks
TST: Skip hist testing for matplotlib <= 1.2

Add skip to the hist test

Add to release notes
TST: Add test for get_data_google dtypes
Merge pull request #8810 from onesandzeroes/mplskip

TST: Skip hist testing for matplotlib <= 1.2
Merge branch 'issue3995' of https://github.com/dstephens99/pandas into dstephens99-issue3995

Conflicts:
	doc/source/whatsnew/v0.15.2.txt
ENH: serialization of categorical to HDF5 (GH7621)