BUG: dtype query with negation bug (GH8568)
DOC: updates release and v0.15.0.txt for release
DOC: fix example of GH8512 name clash with following examples
Merge pull request #8579 from jorisvandenbossche/doc-fixes015

DOC: fix example of GH8512 name clash with following examples
RLS: 0.15.0 final
DOC: start 0.15.1 cycle for docs