TST: Change test_html to use stored data.

+ Change up test decorators so no tests marked as network and slow.
Merge pull request #4009 from jtratner/add-network-label-to-test-html

TST: Change test_html to use stored data + mark other
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