Fix to PolygonizeLines so it works better with 3D data
MP: optimize by skipping color layers when rendering a depth camera
Fix: polyline auto-scale and GPU clamping not working together
Lower the default depth camera size to 1024
MP: patch a rare situation in which a TileModel creation can fail
Attempt to fix GDAL elevation sampling issues on the edges of datasets due to half pixel shift.
Merge branch 'master' of https://github.com/gwaldron/osgearth
Comply with users DISPLAY environment.

Was preventing use from any display other than 0 on Linux.
add write options for elevation output plugins
Merge pull request #473 from remoe/add/packager_options

add write options for elevation output plugins
Merge pull request #472 from rkits/patch-1

Comply with users DISPLAY environment.
Fix: draping textures were corrupting the terrain texture.
Merge branch 'master' of github.com:gwaldron/osgearth
Fix backwards-compat compile error
ShaderGen: fixed a uniform bug
Fix: Parent (fallback) colordata structure was not assigning the proper order member
Fix: Group node statesets were being ignored by the ShaderGen
Fixed fill and outline behavior
Merge pull request #475 from jds7717/master

Fixed fill and outline behavior
ShaderGen: add TexMat support