Initial checkin

Signed-off-by: Paul Brook <paul@nowt.org>
Split cube implementation from demo framework

Signed-off-by: Paul Brook <paul@nowt.org>
glcube.py is not directly executable

Signed-off-by: Paul Brook <paul@nowt.org>
Remove uneccessary imports

Signed-off-by: Paul Brook <paul@nowt.org>
Fix cube bound in swipe example

Signed-off-by: Paul Brook <paul@nowt.org>
Swipe in both directions.

Signed-off-by: Paul Brook <paul@nowt.org>
Add serial cube implementation

Signed-off-by: Paul Brook <paul@nowt.org>