Merge pull request #6656 from sinhrks/area_pr2

ENH/VIS: Area plot is now supported by kind='area'.
Merge pull request #7007 from rosnfeld/issue_6623

BUG: fixing tseries plot cursor display, resolves #5453
TST: clean of test_offsets.py
Merge pull request #6135 from hayd/mi_partial_sorting

ENH partial sorting for mi in sortlevel
Merge pull request #6578 from hayd/groupby_selecte_badcols

FIX raise when groupby selecting cols not in frame
BUG: error in Float64Index with contains and non-float (GH7025)
BLD: fix build caching
ENH: Scatter plot now supports errorbar
BLD: caching update 2
Merge pull request #6834 from sinhrks/errorbar

ENH: Scatter plot now supports errorbar
BLD: fix caching 3
BLD: fix caching 4
Merge pull request #7026 from jreback/float_ni

BUG: error in Float64Index with contains and non-float (GH7025)
TST: Deprecation -> FutureWarning + catch in tests
BLD: update submit_cache.py to to properly submit caches to iron.io
TST: nose.Skiptest on RemoteDataErrors in tests for io.data.Options

Added to release notes

Added to release notes

Fixed warning tests for RemoteDataError

TST: nose.Skiptest on RemoteDataErrors in tests for io.data.Options

Added to release notes

Conflicts:
	doc/source/release.rst
BUG/TST: fix get_schema + add tests

- adapt signature of get_schema to what it was before (for backwards compatibility), possibility to call function without connection object
- fix get_schema for sqlalchemy mode
- add tests
SQL: revert deprecated tquery/uquery to 0.13 version

As tquery and uquery are deprecated, it is not needed to adapt them to the new sqlalchemy interface + the adapted version changed the signature slightly so it was not fully backwards compatible.
Therefore: put back the old code and removed new implementatation in the classes.
Consequence: the functions are not available for the new sqlalchemy engines, but as they are deprecated this is not needed.
Merge pull request #7034 from dstephens99/OptionTests

TST: nose.SkipTest on RemoteDataErrors in tests for io.data.Options
ENH: support pie plot