BUG: GH3449 .loc was not raising when passed an integer list

     PTF
Merge pull request #3451 from jreback/GH3449

BUG: GH3449 .loc was not raising when passed an integer list
ENH/CLN: redo pprint_warts merge, rebased PR lost the show
BUG: GH3448  Unordered time series selection was misbehaving when using label slicing
Merge pull request #3452 from jreback/GH3448

BUG: GH3448  Unordered time series selection was misbehaving when using label slicing
initial commit of new html module
no need to support bs3
cleanup
refactor some functions and remove useless arguments from user facing API
rename parser to flavor
some commentary
use unicode
provide the correct error message when more than one table is detected
cleanup
clean up and add commentary
we only care if a skiprows object is a container
provide a more useful error message when no matching text is found
flesh out tests
whoops syntax error
add data sets