Typo in docstring.
Only set 'consider' if no value was supplied.
Fix bug in _auto_legend_data which caused the vertex list to always be empty.
Fix bug in helper function which prevented the legend from avoiding vertices.

This bug was not triggered before because count_contains() was never
called due to the empty vertex list in Legend._find_best_position().
Add TODO note about marker extents and vertex overlaps.
Typo in docs.
Fix test failure (caused by corner case in np.concatenate).
Add new test for automatic legend placement to check that vertices are indeed taken into account.
Add FIXME comment.
Also use 'loc=0' in 'test_various_labels' to further test the new code.
Merge branch 'fix_legend_loc_best' of git://github.com/maxalbert/matplotlib into maxalbert-fix_legend_loc_best

Conflicts:
	lib/matplotlib/tests/baseline_images/test_legend/legend_various_labels.pdf