TST: skip tests needing xlrd
Merge pull request #3517 from lodagro/test_excel

TST: skip tests needing xlrd
Fixed Unbound Variable `edge` access when BinGrouper is empty

Incorrectly accessed variable `edge` instead of pre-filled value `start`.

Signed-off-by: Kevin Stone <kevinastone@gmail.com>
Merge branch 'PR3510'

* PR3510:
  Fixed Unbound Variable `edge` access when BinGrouper is empty
ENH: add ability to read html tables directly into DataFrames

use __import__ on 2.6

extra code from previous merges and importlib failure on tests

fix bs4 issues with no match provided

docstring storm!

markup slow tests (bank list data) and add tests for failing parameter values
PTF

ok that is really it for docstring mania

add testfor multiple matches