BUG: allow get default value upon IndexError, GH #7725
Fix bdist_wheel. Add Tag information to WHEEL dist info.

Related: http://lepture.com/en/2014/python-on-a-hard-wheel
BUG/ENH/API: ewm* debias, 'adjust', min_periods; roll/exp_var/std 1 val
SQL: add warning for mismatch in provided and written table name (GH7815)
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.
ERR: pass original error message in read_sql_query (GH7730)
BUG: barplot with NaNs
DOC: Table about how plots handle missing data.
Merge pull request #8177 from TomAugspurger/barplot-NaN

BUG: barplot with NaNs
BUG: Fix Grouper with multi-level index and frequency (GH7885)
BUG: Fix mismatched logic error in compatibility check
Merge pull request #8203 from jtratner/fix_openpyxl_compat_check

BUG: Fix mismatched logic error in compatibility check
Merge branch 'Fix-GH7885' of https://github.com/jmorris0x0/pandas into jmorris0x0-Fix-GH7885
COMPAT:  dtype on windows related to GH8172
Merge pull request #7728 from dsm054/fix-get-indexerror

BUG: allow get default value upon IndexError, GH #7725
more verbosity to PyTables import failures
Merge pull request #8195 from someben/master

ENH: more verbosity to PyTables import failures
BUG: Bug in read_csv where squeeze=True would return a view (GH8217)
Merge pull request #8218 from jreback/squeeze

BUG: Bug in read_csv where squeeze=True would return a view (GH8217)
ENH to_latex mi index will use & sep for levels