If a light manager is not registered, the existing behaviour (activate the closest lights to the camera) will be retained unchanged. New example project added to demonstrate the usage, and regression tests and existing samples run. No regression test for the light manager yet, since I am more interested in not regressing the default behaviour.
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2064 dfc29bdd-3216-0410-991c-e03cc46cb475