Set rcmod.py to create translucent legend frames

As of 1.4.1, matplotlib includes a key for the default transparency of
legend frames: "legend.framealpha". *Personally,* I prefer the look of
this when a plot doesn't have much free space for the legend to avoid
overlap with data, but I leave it to others to accept or not. I also
don't know how to best handle compatibility with earlier versions of
mpl.
List the files that go in the source distribution
Merge remote-tracking branch 'upstream/master'
Turn the frame on by default
Fix bandwidth specification for multivariate scipy kde

Closes #382
Merge branch 'master' of github.com:mwaskom/seaborn
Merge branch 'missing-files' of github.com:sergiopasra/seaborn into sergiopasra-missing-files
Remove doc and examples from pypi source files
Merge pull request #343 from e-q/master

Add translucent legend frames to axes styles
Merge branch 'master' into kdeplot_shade_no_label