BUG: GH3468 Fix assigning a new index to a duplicate index in a DataFrame would fail
ENH: support for having duplicative indices across blocks (dtypes)

BUG: fix construction of a DataFrame with duplicative indices
BUG: enabled applymap to work (and updated internals/convert to use iget) when

     using a non-unique index (GH2786 for the warning and GH3230 for applymap)

TST: test for GH2194 (which is fixed)
BUG: GH3495 change core/format/CSVFormatter.save to allow generic way of dealing

     with columns duplicate or not
Add mangle_dupe_cols option to read_csv/table GH3468
DOC: add RELEASE.rst note anticipating breaking change in 0.12.0
PERF: allow a cache_readonly to be 'set' if allow_settings is passed on the decoration

      useful when specifiying an index that is **known** to be unique (e.g. in the case
      of a default range index)
Merge pull request #3509 from jreback/dup_columns2

BUG/CLN: Allow the BlockManager to have a non-unique items (axis 0)
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
DOC: CONTRIBUTING.md, add link to discussion on plotting code conventions
DOC: update RELEASE.rst
Merge branch 'cpcloud_read_html'

* cpcloud_read_html:
  DOC: update RELEASE.rst
  ENH: add ability to read html tables directly into DataFrames
BUG: fix qt console repr
Merge pull request #3527 from cpcloud/qt-repr-bug

fix qt repr bug
Merge pull request #3511 from y-p/PR_mangle_dupe_cols_option

ENH: add mode.mangle_dupe_cols option GH3468
Added failing test case for union of two timezone-aware indexes with month end frequencies.

Signed-off-by: Kevin Stone <kevinastone@gmail.com>