j3dcore: move fixup for null apcontext into the JOGLPipeline implementation

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
j3dcore: small style change to do an early return when the appContext does not need checking

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
j3dcore: kill use of SUN_global_alpha

Due to a typo testing for the extension, the jogl pipeline has never enabled this
extension.  Just kill it.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
j3dcore: prepare to refactor the Font3D tesselation code, move variables next to use

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
j3dcore: update version to 1.6.0-pre10

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>