ShaderGen: add TexMat support
Make gcc happy by re-ordering constructor init members
Set ignore hint on MapNode and SimpleSkyNode for ShaderGen
Merge branch 'master' of github.com:gwaldron/osgearth
VirtualProgram: dump shaders without merging them
ShaderGenerator: fix bug in texmat support
Removed unused code
Added transition when you're moving from a regular viewpoint to tethering instead of just jumping to the tethernode.

Updated osgearth_manip with a duration in the call to setTetherNode.
Merge branch 'master' of https://github.com/gwaldron/osgearth
ShaderGenerator: fix support for ignores and for disabled attributes.
ShaderGenerator: support ALL non-mode GL texture attributes by always including them for shadergen
ShaderGenerator: fix for OSG versions <3.3.1
Not modifying the heading and pitch when tracking the tethered node.
Merge branch 'master' of https://github.com/gwaldron/osgearth
Removed unused code
Fix jumping in viewpoint transition

Not doing collision avoidance when it is disabled, you are tethered or
you are doing a viewpoint transition.  This also lets you disable
collision avoidance dynamically which you couldn't do before.
Simplified the setTetherNode demo in osgearth_manip.
MP: min and max filtering were switched on terrain tile textures
Merge branch 'master' of github.com:gwaldron/osgearth
ImageUtils: Correct casting for GL_RGB5_A1 reader