Merge pull request #5342 from jreback/timestamp

API: provide compat for Timestamp  now/today/utcnow class methods (GH5339)
Merge pull request #5343 from jreback/assign_eval

ENH: allow in-line expression assignment with df.eval
CLN: Add axis kwarg to Series wrapper for compat

Update tests to cover full range of Series flex ops and check that they
all accept an axis argument.
Merge pull request #5352 from jtratner/add-axis-kwarg-to-series-flex

CLN: Add axis kwarg to Series wrapper for compat
BUG/ENH: Allow drop to accept axis name

Add tests for DataFrame, Series and Panel, with axis checks, etc.
Merge pull request #5354 from jtratner/allow-drop-to-accept-names

BUG/ENH: Allow drop to accept axis name
DOC: Added/fixed some docstrings, esp Panel flex

str representation of functions is not pretty.

DOC/CLN: Wrap 0.13's release.rst at 80 characters per line.
Merge pull request #5336 from jtratner/minor-doc-cleanups

DOC: Added/fixed some docstrings, esp Panel flex
ENH: Add inplace option to drop and dropna
Merge pull request #5247 from jtratner/inplace-drop

ENH: Add inplace option to drop and dropna
TST: Make sure files are removed in test_graphics

plt.savefig() appends an extension by default, which messes up
ensure_clean(). Added option to ensure_clean() to just return file-like.
Merge pull request #5359 from jtratner/always-cleanup-graphics-files

TST: Make sure files are removed in test_graphics
TST/CLN: Only print on test failure.

Don't pollute test output.
Merge pull request #5360 from jtratner/only-print-conditionally-in-tests

TST/CLN: Only print on test failures.
TST: Precision issues with infer on OSX
Merge pull request #5362 from TomAugspurger/interp_dtype_infer

TST: interpolate precision inference
win32 paths cannot be turned into URLs by prefixing them with "file://"

see http://stackoverflow.com/questions/11687478/convert-a-filename-to-a-file-url
Revert "TST: Precision issues with infer on OSX"

This reverts commit 0a5026f2ce1c61a7aceb5f22addbac4b9f8fbab1.
Merge pull request #5100 from mindw/win32_tests_fix_master

TST: win32 paths cannot be turned into URLs by prefixing them with "file://" v2
ENH: HDFStore.flush() to optionally perform fsync (GH5364)