Merge remote branch 'upstream/master'
cleanup in MP-TMC
Fix: resolved SA orphaning issues with the StateSetCache
Merge branch 'master' of github.com:gwaldron/osgearth
Fix: had to disable the Vertex Cache optimizer on BGF due to a crash.
Fix: add VertexCacheOptimizer to work around the OSG MeshOptimizer bug in which it sometimes corrupts line geometries
Fix: TerrainOptions::minLOD not working in MP
Code cleanup: removed #if 0 blocks and commented-out code in various places
Added ArcGIS ServiceReader utility
Merge branch 'master' of https://github.com/gwaldron/osgearth
Made getFolder const

Added missing RESTResponse constructor.
Added const version of getServices and getFolders to ARcGIS RESTResponse.
Added TileMapServiceReader utility for reading lists of TMS TileMaps.
Fix: oops, VetexCacheOptimizer was calling getType() instead of getMode()!
remove a notify
Merge branch 'master' of github.com:gwaldron/osgearth
Added setName function for TerrainLayers, it just seems right.
Merge branch 'master' of https://github.com/gwaldron/osgearth
Fix #364 improper outlines when stroke-width is in meters
Merge branch 'master' of github.com:gwaldron/osgearth