Lose squirrel, we aren't using it

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>
Add make_current and iconify support

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>
Sort out extensions and start Framebuffer object

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>
Fix Framebuffers to make them much more elegant

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>