various chunks. In the future, we'll use this to have a single control
integrating panzoom and panzoombar, but not quite yet. Revamped patch
from kkempfer (thx!) with tests. r=me (Closes#754)
git-svn-id: http://svn.openlayers.org/trunk/openlayers@6514 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf