Sync...

- add hash state store/restore

[shader-ast] texture2D call in vertexShader causes error.

* 'develop' of github.com:thi-ng/umbrella:
  removing optional for texelFetch & texelOffset as well.
  texture bias fix

- add tests

- don't throw error if total weights <= 0 (only print warning)

- add store/restore from hash state
- add ACT palette download (photoshop format)
- split into separate source files

 - @thi.ng/adjacency@0.3.1
 - @thi.ng/arrays@0.10.3
 - @thi.ng/associative@5.1.1
 - @thi.ng/bencode@0.3.51
 - @thi.ng/cache@1.0.71
 - @thi.ng/color@3.1.0
 - @thi.ng/colored-noise@0.1.15
 - @thi.ng/csp@1.1.51
 - @thi.ng/csv@0.1.11
 - @thi.ng/dcons@2.3.11
 - @thi.ng/dgraph-dot@0.1.39
 - @thi.ng/dgraph@1.3.10
 - @thi.ng/distance@0.1.3
 - @thi.ng/dsp-io-wav@0.1.41
 - @thi.ng/dsp@3.0.7
 - @thi.ng/ecs@0.5.1
 - @thi.ng/egf@0.3.13
 - @thi.ng/fsm@2.4.38
 - @thi.ng/fuzzy-viz@0.1.9
 - @thi.ng/geom-accel@2.1.36
 - @thi.ng/geom-api@2.0.7
 - @thi.ng/geom-arc@0.3.25
 - @thi.ng/geom-clip-line@1.2.21
 - @thi.ng/geom-clip-poly@1.0.46
 - @thi.ng/geom-closest-point@0.5.12
 - @thi.ng/geom-fuzz@0.1.35
 - @thi.ng/geom-hull@0.0.78
 - @thi.ng/geom-io-obj@0.1.36
 - @thi.ng/geom-isec@0.7.10
 - @thi.ng/geom-isoline@0.1.76
 - @thi.ng/geom-poly-utils@0.3.7
 - @thi.ng/geom-resample@0.2.58
 - @thi.ng/geom-splines@0.5.45
 - @thi.ng/geom-subdiv-curve@0.1.76
 - @thi.ng/geom-tessellate@0.2.59
 - @thi.ng/geom-voronoi@0.2.21
 - @thi.ng/geom@2.1.2
 - @thi.ng/gp@0.2.7
 - @thi.ng/grid-iterators@0.4.23
 - @thi.ng/hdiff@0.1.28
 - @thi.ng/hdom-canvas@3.0.33
 - @thi.ng/hdom-components@4.0.25
 - @thi.ng/hiccup-canvas@1.1.23
 - @thi.ng/hiccup-css@1.1.50
 - @thi.ng/hiccup-markdown@1.3.2
 - @thi.ng/hiccup-svg@3.7.8
 - @thi.ng/iges@1.1.61
 - @thi.ng/imgui@0.2.55
 - @thi.ng/iterators@5.1.51
 - @thi.ng/ksuid@0.1.2
 - @thi.ng/leb128@1.0.45
 - @thi.ng/lsys@0.2.73
 - @thi.ng/matrices@0.6.45
 - @thi.ng/poisson@1.1.29
 - @thi.ng/ramp@0.1.47
 - @thi.ng/random@2.3.1
 - @thi.ng/range-coder@1.0.70
 - @thi.ng/rdom-canvas@0.1.31
 - @thi.ng/rdom-components@0.1.28
 - @thi.ng/rdom@0.4.0
 - @thi.ng/rstream-csp@2.0.54
 - @thi.ng/rstream-dot@1.2.1
 - @thi.ng/rstream-gestures@3.0.8
 - @thi.ng/rstream-graph@3.2.55
 - @thi.ng/rstream-log-file@0.1.76
 - @thi.ng/rstream-log@3.2.5
 - @thi.ng/rstream-query@1.1.61
 - @thi.ng/rstream@5.1.3
 - @thi.ng/sax@1.1.50
 - @thi.ng/scenegraph@0.3.19
 - @thi.ng/shader-ast-glsl@0.2.22
 - @thi.ng/shader-ast-js@0.5.21
 - @thi.ng/shader-ast-stdlib@0.5.14
 - @thi.ng/shader-ast@0.8.0
 - @thi.ng/simd@0.4.18
 - @thi.ng/soa@0.2.1
 - @thi.ng/sparse@0.1.66
 - @thi.ng/system@0.2.39
 - @thi.ng/text-canvas@0.4.6
 - @thi.ng/transducers-binary@0.6.7
 - @thi.ng/transducers-fsm@1.1.50
 - @thi.ng/transducers-hdom@2.0.82
 - @thi.ng/transducers-patch@0.2.7
 - @thi.ng/transducers-stats@1.1.51
 - @thi.ng/transducers@7.6.1
 - @thi.ng/vector-pools@2.0.1
 - @thi.ng/vectors@5.0.1
 - @thi.ng/viz@0.2.11
 - @thi.ng/webgl-msdf@0.1.74
 - @thi.ng/webgl-shadertoy@0.2.61
 - @thi.ng/webgl@4.0.1
 - @thi.ng/zipper@0.1.37