Changes

Bug 735: Bug735Inv4AWT on Java7 is also stuttering!

ES3.0 GLContext: Handle ES3.0 GLSL Version Number - Static detection and 'es' suffix.

GLFBODrawableImpl: Fix swap criteria, i.e. don't swap in contextMadeCurrent(false) if already swapped by swapBuffersImpl(..), but always swap in swapBuffersImpl(..) if ctx is current and associated.

timespec.c/h: Add 'long timespec_microseconds(..)'

Fix Bug 753: Stuttering caused by lack of GL resource synchronization between Java GL- and CALayer thread ; Simplify / Fix waitUntilRenderSignal().

Stuttering caused by lack of GL resource synchronization between Java GL- and CALayer thread
+ // Required(?) to finish previous GL rendering to give CALayer proper result,
+ // i.e. synchronize both threads each w/ their GLContext sharing same resources.
+ //
+ // FIXME: IMHO this synchronization should be implicitly performed via 'CGL.flushBuffer(contextHandle)' above,
+ // in case this will be determined a driver bug - use a QUIRK entry in GLRendererQuirks!
+ gl.glFinish();

Simplify / Fix waitUntilRenderSignal()
- remove loop and 'ready' condition -> nonsense
- if too later, i.e. lastWaitTime+TO < now, use now+TO as max. vsync waiting time

Bug735 Tests:
  - Make vsync, wait and ECT (exclusive context thread) configurable via main args.
  - Inv2*, Inv3* and Inv4*: Fluent Animation
  - Works w/ ECT

Bug735: Bug735Inv0AppletAWT/Bug735Inv1AppletAWT tests: Use shader customization, no Clear required, .. (still don't work w/ CALAyer)

Solve Bug 735 Mystery: glViewport(..) was missing - duh :)

Bug 735: Fix comment in test, since mystery is solved :)