Merge pull request #6754 from jreback/timedelta_perf

PERF: perf improvements in timedelta conversions from integer dtypes
DOC: correct alignment of GH6756
BUG: Series.iteritems should be lazy
ENH: Panel.shift now uses NDFrame.shift.
PRF: Adding Panels.shift test

DOC: Panel.shift no longer drops periods.
Merge pull request #6761 from TomAugspurger/lazy-iteritems

BUG: Series.iteritems should be lazy
Merge branch 'general-shift-4867-panel' of https://github.com/dalejung/pandas into dalejung-general-shift-4867-panel

Conflicts:
	doc/source/release.rst
	doc/source/v0.14.0.txt
BUG: Use reversed to check for list
DOC: cookbook
DOC: Issue #6763 - Corrected MERGE example
Merge pull request #6776 from SplashDance/master

DOC: Issue #6763 - Corrected MERGE example
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BUG: Bug in setting a tz-aware index directly via .index (GH6785)
Merge pull request #6786 from jreback/set_index

BUG: Bug in setting a tz-aware index directly via .index (GH6785)
BUG: bug in taking all on a multi-index when only level 0 is specified (GH6788)
TST: simply some yahoo network tests
Merge pull request #6790 from jreback/slice

BUG: bug in taking all on a multi-index when only level 0 is specified (GH6788)
DOC: Improve doc-string for `copy` kw on `convert_object()` (GH1234)
Merge pull request #6791 from ankostis/master

DOC: Improve doc-string for `copy` kw on `convert_object()` (GH1234)
Merge pull request #6765 from TomAugspurger/lazy-iteritems

BUG: Use `reverse` to check for non-lazy
BUG: duplicate (getitem) indexing with iloc (GH6766)