Created sprayNumber2 Added Point and Stroke class

Getting ready to implement point extrapolation and proper object
oriented stroke management.
Refactoring
Proper object structure + filling in the gaps
Added texture based distribution of the particles

First test (see "radialGradient4")
Adjusted gradient lookup
Added debug option
Merge pull request #7 from JesseScott/develop

Shaders + Libraries
Merge pull request #9 from JesseScott/develop

Keystone library and updated read me
Merge pull request #11 from JesseScott/develop

Working on Camera Threading + added last know Seoul archive
Merge pull request #12 from GraffitiResearchLabGermany/develop

Develop --> Master (for sake of easier merges later, not b/c there's anything super important)
Don't compute/redraw all points on every frame
Better image-gradient-based brush handling
sprayNumber3 functional with gradient based dispersion
Merge pull request #19 from SableRaf/master

Faster spray simulation + image based dispersion
Testing spray angle animation (radialGradient5)
Merge pull request #20 from SableRaf/master

Spray angle prototype
Merge pull request #2 from GraffitiResearchLabGermany/master

Getting Raf's Spray