Updated readme.

Some precomputations tweaks (average intensities calculated, etc.) and fixed.

Started implementing precomputation for the remaining attributes.

Ghost bounds computation fully functional.

Added some missing values (coating information) to the optical system descriptions.

Added a generic algorithm for enumerating ghosts with any number of reflections.

Lens flare preview parameters more or less finished.

Added support for editing the optical system preview parameters. It is possible to tweak global visualization attributes, as well as dynamically select the list of rays rendered.

Added controls to the optical system previewer widget.

Merge branch 'master' of https://github.com/luorax/OpenLensFlare

Added new, better example optical systems.

Update README.md

Fixed an uncaught bug related to ray visualization in optical systems.

Initial commit.