Improved font support.
Added backcolor to layer and updated rendering.
Added overload to renderer without backcolor.
Support backcolor on merge scenes and scene layers.
Added possibility to render a bit more than just what is visible.
Fixed issue in StyleLine equals.
Fixed ZoomToMarkers.
Merge branch 'master' of https://github.com/OsmSharp/OsmSharp
Fixed marker scaling for drawable
Merge pull request #196 from Macjon/master

Fixed marker scaling for drawable
Merge remote-tracking branch 'upstream/master'