CLN: Small fix to clean_pyc task
Merge pull request #4123 from jreback/win_bug

BUG/TST: test fixes for windows compat
Merge pull request #4124 from jtratner/small_Makefile_fix

CLN: Small fix to clean_pyc task
fix typo - change conn to con
BLD: use binary packages to reduce travis-ci build times.
Merge pull request #4128 from y-p/PR_travis_speedups

BLD: use binary packages to reduce travis-ci build times.
Merge pull request #4127 from tshauck/fix-io-typo

fix typo - change conn to con
BUG: GH4080, int conversion of underlying series to float needs updating in parent frame

DOC: update release notes