Try to optimize the image layer by avoiding unnecessary image conversions
Always use RGBA images as input for image mosaic and optimized RGB8 to RGBA8 conversion
Merge branch 'master' of https://github.com/gwaldron/osgearth into Optimize_ImageLayer
Removed unwanted notice
Merge pull request #469 from aurelien35/Optimize_ImageLayer

Try to optimize the image layer by avoiding unnecessary image conversions