CLN: use how="all" so that things that are not nan in other columns are kept
Merge pull request #4111 from cpcloud/data-dot-py-cleanup

CLN: use how="all" in data.py so that things that are not nan in other columns are kept
CLN/TST: cleanup exception message testing by replacing with assertRaisesRegexp
BUG: fix replace bug when a nested dict was passed
Merge pull request #4114 from jreback/error_msgs

CLN/TST: cleanup exception message testing by replacing with assertRaisesRegexp
Merge pull request #4117 from cpcloud/replace-nested-dict-fix

BUG: fix replace bug when a nested dict was passed
BUG: GH4119 Fixed bug in ``convert_objects(convert_numeric=True)`` where a mixed numeric and

     object Series/Frame was not converting properly

BUG: convert_numeric=False changed for default in convert_objects for Series (which mastches Frame)
Merge pull request #4120 from jreback/convert_objects

BUG: GH4119 Fixed bug in convert_objects(convert_numeric=True) where a mixed numeric and object not converting
BUG/TST: test fixes for windows compat
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
BLD: install pip serially
Merge pull request #4141 from cpcloud/travis-install-pip-serially

BLD: install pip serially
ENH melt uses column name if available
CLN test_reshape