Tile sources: fix parameter name
RenderthemeV4: added map-background-outside directive to blank out all areas outside map
AwtCanvas: implement inverse clip
(RenderthemeV4 map-background-outside directive Java implementation)
Docs: added old presentations and fixed links
RenderthemeV4: map-background-outside directive for transparent layers results in transparency outside map area
Samples: added TwoMaps that renders two map files on top of each other
AndroidUtil: compute the minimum cache size using the size of the map
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