[#111] add sph project and flipflop buffer

projects/CMakeLists.txt

projects/sph/.gitignore

projects/sph/CMakeLists.txt

projects/sph/shaders/bloom/composite.comp

projects/sph/shaders/bloom/downsample.comp

projects/sph/shaders/bloom/lensFlares.comp

projects/sph/shaders/bloom/upsample.comp

projects/sph/shaders/particleShading.inc

projects/sph/shaders/shader.vert

projects/sph/shaders/shader_gravity.comp

projects/sph/shaders/shader_space.comp

projects/sph/shaders/shader_space.frag

projects/sph/shaders/shader_water.comp

projects/sph/shaders/shader_water.frag

projects/sph/shaders/tonemapping.comp

projects/sph/src/BloomAndFlares.cpp

projects/sph/src/BloomAndFlares.hpp

projects/sph/src/Particle.cpp

projects/sph/src/Particle.hpp

projects/sph/src/ParticleSystem.cpp