TST: Tests and fix for unhandled data types in Excel writers.

Added tests and a fix for unhandled numpy data types in the
Excel writers. Issue #3122.
DOC: pytables natural name docs
ENH/REF: Additional methods for interpolate

ENH: the interpolate method argument can take more values
for various types of interpolation

REF: Moves Series.interpolate to core/generic. DataFrame gets
interpolate

CLN: clean up interpolate to use blocks

ENH: Add additonal 1-d scipy interpolaters.

DOC: examples for df interpolate and a plot

DOC: release notes

DOC: Scipy links and more expanation

API: Don't use fill_value

BUG: Raise on panels.

API: Raise on non monotonic indecies if it matters

BUG: Raise on only mixed types.

ENH/DOC: Add `spline` interpolation.

DOC: naming consistency
DOC: Fix name in interpolate plot.
Merge pull request #5165 from TomAugspurger/interp_docfix

DOC: Fix name in interpolate plot.
ENH: add to_dataframe method to Series
RVT: revert 4912 change of 4030 nose import bug
Merge pull request #5170 from cpcloud/remove-debug-and-move-nose

RVT: revert 4912 change of 4030 nose import bug
DOC: whatsnew.rst,missing_data.rst,io.rst updates
DOC: update readme.md for bq/excel deps
DOC: readme.md updates
Merge branch 'series_to_dataframe' of https://github.com/drasch/pandas into drasch-series_to_dataframe

Conflicts:
	doc/source/v0.13.0.txt
API: make allclose comparison on dtype downcasting (GH5174)
TST: update interpolate tests to account for correct dtype inferernce
Merge pull request #5177 from jreback/infer

API: make allclose comparison on dtype downcasting (GH5174)
PERF: calling get_indexer twice when a specialized indexer (e.g. pad) could be called instead
Merge pull request #5178 from jreback/perf_reindex

PERF: calling get_indexer twice when a specialized indexer (e.g. pad) could be called instead
BUG: Fix segfault on isnull(MultiIndex)

Now raises NotImplementedError b/c not yet clear what it should return.
Merge pull request #5125 from jtratner/fix-segfault-mi-isnull

BUG: Fix segfault on isnull(MultiIndex)
TST: addtl pytables tests
Merge pull request #5180 from jreback/pytables_clean

TST: addtl pytables tests