begin moving subsampling and oversampling to Sampler

move Sampler classes to sampler.cc fix demos, make whole project compilable again

Doxygen new Sampler object replacing rendering algorithm with more flexible one -- this breaks most of demos and disables threads and (over-/sub-)sampling functionality, need a rewrote

note for new camera classes

MIT license for sources update README, DEVNOTES and TODO

memory optimization for octree fixed some visual artifacts in textures C++ demo and set ambient occlussion for rendering (-r)

cleaned Texture interface new C++ demo: textures slightly adjusted SAH for kd-tree slightly optimized kd-tree building -- moved termination cond. so it's tested before recursion minor sphere intersection optimization

fix possible division by zero in ccdemos/common_ply.h don't use DEFS variable in makefiles, just add it to CCFLAGS compile float version of libs with -fsingle-precision-constant

Makefile: added help and distclean target, plus small fixes ccdemos/common_sdl.h: print fps to window caption instead of console update and key callbacks fixed segfault when resizing window pressing c now causes print out of camera coordinates ccdemos/spheres_shadow.cc: controlling position of a light and focal length of camera

ccdemos: put the common code to header files, common_ply.h and common_sdl.h move all ccdemos on octree and make them all realtime (-i argument)

realtime_dragon demo: now fullsize model + octree realtime_bunny demo: bigger resolution Box, Sphere: implemented AABB intersection new stop condition for octree building (when number of shapes in children >= 6x shapes in parent node) fixes for octree traversal

octree traversal rewritten to avoid recursion reenabled -O3 optimizations (was accidentaly disabled, now it traces even faster! :-)) realtime_bunny: added FPS counter, fixed a bug in ply loader min3 and max3 templates added to common.h

new virtual Shape::intersect_bbox implementation of triangle-AABB intersection octree building updated and simplified with help of this new method octree made default for Python, it's currently much faster than kd-tree (both building and traversal)

new space partitioning structure: octree realtime_bunny updated to use octree plus other files updated to be container type independent (only user programs are supposed to include and use special containers)

quaternion moved to extra header file updated headers in all sources