TST: allow to check for specific xlrd version and skip reader test if xlrd < 0.9
BUG: Fix Index.__iadd__ bug by setting equal to __add__

fixes #4996

alias Index's __isub__ to __sub__

document fixes to #4996

index isub test

roll back everything non-iadd related
Add DatetimeIndex and Index documentation.

Start documentation for DatetimeIndex and Index.
 ENH: Ability to tz localize when index is implicility in tz

Fix to issue #4230 which allows to localize an index which is
implicitly in a tz (e.g., reading from a file) by passing infer_dst to
tz_localize.
ENH: Added PySide support for qtpandas.
API: Enable changing the DataFrame in the DataFrameWidget.
DOC: Adding an example of using the DataFrameWidget.
EHN: Allow load_data to load the "Titanic" and other problematic R datasets
TST: Move tests from rpy/common.py to rpy/tests/test_common.py
TST: Add tests to demonstrate the enhancements made to rpy/common.py.
DOC: Add explanation to doc/source/release.rst and doc/source/v0.13.0.txt
BUG: fixed a bug in multi-level indexing with a Timestamp partial indexer (GH4294)
Merge pull request #5088 from jreback/mi_timestamp

BUG: fixed a bug in multi-level indexing with a Timestamp partial indexer (GH4294)
TST: Tests for multi-index construction of an all-nan frame (GH4078)
Merge pull request #5089 from jreback/mi_constructor

TST: Tests for multi-index construction of an all-nan frame (GH4078)
Merge pull request #4706 from rockg/tz-localize-aware

ENH: Ability to tz localize when index is implicility in tz
Merge pull request #5013 from alefnula/qtpandas

ENH: PySide support for qtpandas.
Merge branch 'iadd' of https://github.com/d10genes/pandas into d10genes-iadd

Conflicts:
	doc/source/release.rst
Merge branch 'r-dataset' of https://github.com/unutbu/pandas into unutbu-r-dataset

Conflicts:
	doc/source/release.rst
Merge pull request #5058 from neurodebian/master

TST: allow to check for specific xlrd version and skip reader test if xlrd < 0.9