ENH Added ind and bw_method kwargs to KdePlot

[khgitting]

Adds ability to set the bandwidth used for the kde and the indices at which it is evaluated. The first is passed to the bw_method kwarg for scipy.stats.gaussian_kde (for scipy >= 0.11.0); the second is passed to gkde.evaluate. For the case when scipy < 0.11.0 but bw_method is specified, bw_method is ignored (not passed to scipy.stats.gaussian_kde), but a warning is issued to alert the user.

pandas-dev#4298

[cpcloud]

@khgitting looks like you submitted a pr to your own master branch

please rebase off of pydata/pandas/master. try not to go any further back in the history otherwise you'll end up including merge commits and other's commits as you see above.

here's how you can do this with minimal pain

# remove your most recent commit from the staging area
git reset HEAD~1

# stash your changes
git stash

# make sure you have the latest upstream (this may not be necessary)
git fetch upstream
git rebase upstream/master

# pop the stash back into the working directory
git stash pop

# add everything and commit it
git commit -am 'your commit message here'

[cpcloud]

finally, submit a PR to the pydata:master branch not to your own master...i think there are instructions floating around on github somewhere but i don't remember exactly where