model-heading can now be auto, this will calculating a heading based on prev, current and next point in geom
reverted: "TMS: add storeImage() support for the TMS tile source" due to incompatibility with osg-3.0.1
Merge branch 'workswith-3.0.1' into UpstreamTest
added model-heading-bias, mostly useful when using model-heading =  auto, to correct models that are not aligned along x axis
added support for model-placement = interval, instead of it being the same as model-placement = random