CHANGE: modified camera transforms
Camera transforms are now set up so context.modelview converts point into
screen-space instead of 'sensor-space'. This means point Y vector is screen UP,
Z is screen plane normal etc. This is done to simplify compatibility with
current shaders and existing code since it is assumed that the coordinate space
after modelview multiplication does not depend on physical screen placement.
Merge branch 'master' of https://github.com/febret/omegalib