Bugfix: Prevent configuration paths to contain python keywords
Fix DataFrame.from_records error message

Make `create_block_manager_from_arrays` error message use the correct dimensions.  This is different from the situation in `create_block_manager_from_blocks` because in that method the blocks are concatenated along their first dimension, whereas in this method the arrays are concatenated along a new dimension.

Also fix `test_from_records_to_records`, which specified a misleading error message when the shape of the input data did not match the shape implied by the indices.  In particular, the error message omitted the offending dimension entirely!
BUG: Bug in iat return boxing for Timestamp/Timedelta (GH7729)
CLN/COMPAT: cleanup timedelta64[ns] series inferrence
Merge pull request #8294 from ischwabacher/patch-2

ERR: DataFrame.from_records raises misleading exception on shape mismatch
Merge pull request #8298 from jreback/iat

BUG: Bug in iat return boxing for Timestamp/Timedelta (GH7729)
fix variable overwriting in radviz

The variable `n` is set to number of rows in dataframe, and then it overwritten with number of columns, but after that there is loop that should iterate over rows and it uses new value in `n` that holds number of columns already.
TST: windows test fixes for 2.6 / older mpl
ENH/TST/DOC: Implement experimental io.excel._Openpyxl2Writer
Merge pull request #8199 from stas-sl/patch-1

BUG: fix variable overwriting in radviz
BUG: Auto-detect terminal size on max_col/max_row==0
API: accept -1 for layout
Merge pull request #8297 from TomAugspurger/neg-layout

API: accept -1 for layout in plot functions
VIS: default LinePlot rotation of 0
DOC: need blankline for example
Added test and fix for insertion of empty table bug
CLN PEP8 on format.py
Merge pull request #8316 from artemyk/empty_table_insert

BUG: Exception raised when `to_sql` used to insert empty dataframe
Merge pull request #8286 from iwschris/pep8_format

CLN Pep8 on format.py
Merge pull request #7781 from germangh/master

BUG: Prevent config paths to contain python keywords
TST: py2.6 test fix in test_graphics.py