- generate package name initials, use for readme & tests

- refactor declareIndices() to take prop names
- add shared $iter helper fn
- update Mat23/33/44 & Vec2/3/4, GVec

 - @thi.ng/api@4.1.1
 - @thi.ng/associative@0.6.6
 - @thi.ng/atom@1.5.2
 - @thi.ng/bench@0.2.1
 - @thi.ng/bitstream@0.4.16
 - @thi.ng/cache@0.2.23
 - @thi.ng/checks@1.5.8
 - @thi.ng/compare@0.1.7
 - @thi.ng/compose@0.1.2
 - @thi.ng/csp@0.3.62
 - @thi.ng/dcons@1.1.6
 - @thi.ng/defmulti@0.3.9
 - @thi.ng/dgraph@0.2.18
 - @thi.ng/diff@1.0.23
 - @thi.ng/dot@0.1.13
 - @thi.ng/equiv@0.1.8
 - @thi.ng/errors@0.1.7
 - @thi.ng/hdom-components@2.2.5
 - @thi.ng/hdom@4.0.5
 - @thi.ng/heaps@0.2.17
 - @thi.ng/hiccup-css@0.2.21
 - @thi.ng/hiccup-svg@1.0.14
 - @thi.ng/hiccup@2.1.2
 - @thi.ng/iges@0.2.11
 - @thi.ng/interceptors@1.8.13
 - @thi.ng/iterators@4.1.27
 - @thi.ng/memoize@0.2.1
 - @thi.ng/paths@1.6.1
 - @thi.ng/pointfree-lang@0.2.20
 - @thi.ng/pointfree@0.8.8
 - @thi.ng/range-coder@0.1.11
 - @thi.ng/resolve-map@3.0.11
 - @thi.ng/rle-pack@1.0.3
 - @thi.ng/router@0.1.23
 - @thi.ng/rstream-csp@0.1.106
 - @thi.ng/rstream-dot@0.2.45
 - @thi.ng/rstream-gestures@0.5.7
 - @thi.ng/rstream-graph@2.1.31
 - @thi.ng/rstream-log@1.0.57
 - @thi.ng/rstream-query@0.3.44
 - @thi.ng/rstream@1.12.1
 - @thi.ng/sax@0.3.20
 - @thi.ng/strings@0.3.3
 - @thi.ng/transducers-fsm@0.2.19
 - @thi.ng/transducers-hdom@1.0.7
 - @thi.ng/transducers-stats@0.4.6
 - @thi.ng/transducers@2.1.1
 - @thi.ng/unionstruct@0.1.14
 - @thi.ng/vectors@1.1.0