Fix: forgot to re-apply geometry optimizations after BGF refactor
Fix #406 only set MP terrain color is expressly requested
Fix #406 oe_terrain_color only set on demand; prevent color state leakage from MP terrain; change default terrain blending to true and consider removing the option altogether in the future
TerrainLayer max_data_level will now limit an layer's resolution without removing it (like max_level does)
Fix #408 #65 texture filtering per layer
Fixed V8 CMake files to include debug libs.
Merge branch 'master' of https://github.com/gwaldron/osgearth
Fix: MP paged lods setting the paging priority improperly
Merge branch 'master' of github.com:gwaldron/osgearth
Fix for issue #409 - AlphaEffect does not honor ShaderPolicy on model layers.
Merge branch 'master' of https://github.com/gwaldron/osgearth
Fix: broken incremental update
Merge branch 'master' of github.com:gwaldron/osgearth
Changes to the EarthManipulator to allow zoom and pinch at the same time.

Removed the need to check for the previous event type in multitouch and
check with time.  Works better with GraphicsWindowWin32 now.
Removed the need to set the OPTION_SCALE_Y for dragging for multitouch
to be sensible.  This may break Android dragging if it isn't set.
Merge branch 'master' of https://github.com/gwaldron/osgearth
Bump version to 2.5 RC2