Clip singleTile image to maxExtent
Override getImageSize function to take clipped images into account

singleTile layers may have clipped images to not exceed the maxExtent.
Whitespace fixes
Use correct getImageSize API

Without the bounds argument, getImageSize would fail in singleTile mode.
Updating tests and adding a test to make sure that clipping works
Map docs: remove non-existent extent option
trim the value of the Label tag in an SLD document, this prevents whitespace added for readability influencing the value of the label
Merge pull request #1048 from bartvde/sldlabel

trim the value of the Label tag in an SLD document, this prevents whites... (r=@fredj,@ahocevar)
Merge pull request #1036 from ahocevar/singletile-maxextent

singleTile overlays repeating when base layer has wrapDateLine false. r=@bartvde
Merge pull request #1046 from probins/noextent

Map docs: remove non-existent extent option
Merge pull request #1050 from OrdnanceSurvey/os-ol-bounds-bbox-fix

Documentation change for Bounds.toBBOX()
Merge branch 'master' of https://github.com/openlayers/openlayers into os-ol