ENH: plot.scatter should pass errorbar keyword args

[selasley]

Is your feature request related to a problem?

Scatter plots do not accept errorbar keyword arguments such as capsize, elinewidth, etc

Describe the solution you'd like

plot.scatter should pass keyword arguments specific to matplotlib's errorbar function to errobar() so errorbars can be customized.

API breaking implications

None?

Describe alternatives you've considered

Instead of passing xerr or yerr to plot.scatter and letting pandas plot errorbars, call ax.errobar manually after ax = plot.scatter

Additional context

df = pd.DataFrame(data={'x': [0, 1, 2, 3, 4, 5, 6],
                        'y': [0, 2, 5, 4, 7, 6, 11],
                        'yerr': [1, .2, .3, .4, .5, .6, .5],
                        'xerr': [.5, .6, .5, 1, .2, .3, .4, ]},
                  )
df.plot(kind='scatter', x='x', y='y', xerr='xerr', yerr='yerr',
        s=60, fc='none', ec='r',
        capsize=3, elinewidth=0.5, ecolor='b', errorevery=2)

AttributeError: 'PathCollection' object has no property 'capsize'