Fix bdist_wheel. Add Tag information to WHEEL dist info.

Related: http://lepture.com/en/2014/python-on-a-hard-wheel
API: support `c` and `colormap` args for DataFrame.plot with kind='scatter'

`matplotlib.pyplot.scatter` supports the argument `c` for setting the color of
each point. This patch lets you easily set it by giving a column name (currently
you need to supply an ndarray to make it work, since pandas doesn't use it):

	df.plot('x', 'y', c='z', kind='scatter')

vs

	df.plot('x', 'y', c=df['z'].values, kind='scatter')

While I was at it, I noticed that `kind='scatter'` did not support the `colormap`
argument that some of the other methods support (notably `kind='hexbin'`). So
I added it, too.

This change should be almost entirely backwards compatible, unless folks are naming
columns in their data frame valid matplotlib colors and using the same color name
for the `c` argument.

A colorbar will also be added automatically if relevant.
ENH to_latex mi index will use & sep for levels
appended newline to DataFrame.info() output
BUG: DatetimeIndex.asof matches partial dates
Merge pull request #7780 from shoyer/plot-frame-scatter

API: support `c` and `colormap` args for DataFrame.plot with kind='scatter'
Merge pull request #8246 from TomAugspurger/datetime-asof

BUG: DatetimeIndex.asof matches partial dates
ENH: Add duplicated/drop_duplicates to Index
Merge pull request #8204 from jreback/doc

DOC: reorg indexing docs
Merge pull request #8114 from BorisVerk/master

BUG: fixed df.info() output missing new line
BUG: plot methods modified rcParams
DOC: Correct and expand Series.nonzero docstring

- Mention that a tuple of indices is returned and explain why.
- Instead of numpy.ndarray.nonzero, point to numpy.nonzero, which has
  the full documentation.
- Add example.
Merge pull request #8247 from kyleam/fix-nonzero-docstring

DOC: Correct Series.nonzero docstring
Merge pull request #8249 from TomAugspurger/color-cycle

BUG: plot methods modified rcParams
Clarification to .ix functionality
Made clear that .ix does not support positional indexing
in the case where the corresponding dimension has an
integer index.
New "ambiguous" argument in tz_localize to enhance support for ways of resolving transition times ('infer', dot indicators, 'NaT', and 'raise')
Merge pull request #7963 from rockg/master

Support is_dst indicators in tz_localize
ENH: SQL support for writing NaN + datetime64 values (GH2754, GH7103)

Cast values to object dtype converts to native python types.
For datetime64 columns these are converted to datetime.datetime
which also fixes the datetime64 issue (supercedes PR GH8205).
NaN issue is solved by converting all NaN values to None.
ENH: refactor to_sql insert_data - performance improvement (GH8208)
Merge pull request #8208 from jorisvandenbossche/sql-2754-nan

ENH: sql support for writing NaN + datetime64 values (GH2754, GH7103)