Flip the texture coordinates instead of flipping textures.
This simplifies the TextureManager (no need to worry if the caller wants flipping or not), should make it easier to generalize & multithread it.
Practical benefits:
- Filter settings are now applied to native OSG format models. These models do not use TextureManager::getTexture2D since the model itself specifies a Texture.
- The GUI render manager will be able to use its own separate textures, making it easier to turn off filtering for them.
Added some basic support for linking to OpenSceneGraph and its plugins
statically. Also added a library necessary to statically link MyGUI
(previously Ogre pulled it in).
For some reason, the mipmap generator seems to be broken on Linux Intel graphics (works on Nvidia). This was breaking the scrollbar arrows, which are minified enough to show using a mipmap.
