Extended core library for Clojure/Script that emphasizes:
  * Cross platform API compatibility
  * Flexibility
  * Performance
  * Backwards compatibility

This lib's mostly for my own use and for advanced users that feel
comfortable reading this source. Not providing much beginner-oriented
documentation for this, sorry.

Quick Taoensso naming conventions:
  **foo** - Dynamic var
  foo!    - Fn with side effects, or that should otherwise be used cautiously
  foo?    - Truthy val or fn that returns truthy val
  foo!?   - Fn that has side effects (or requires caution) and that return
            a truthy val. Note: !?, not ?!
  foo$    - Fn that's notably expensive to compute (e.g. hits db)
  foo_    - Dereffable val (e.g. atom, volatile, delay, etc.)
  foo__   - Dereffable in a dereffable (e.g. delay in an atom), etc.
  _       - Unnamed val
  _foo    - Named but unused val
  ?foo    - Optional val (emphasize that val may be nil)
  foo*    - A variation of `foo` (e.g. `foo*` macro vs `foo` fn)
  foo'    - ''
  -foo    - Public implementation detail or intermediate (e.g. uncoerced) val
  >foo    - Val "to   foo" (e.g. >sender, >host), or fn to  put/coerce/transform
  <foo    - Val "from foo" (e.g. <sender, <host), or fn to take/coerce/transform
  ->foo   - Fn to put/coerce/transform

Commit message tags (in priority order):
  [mod] - Modify     behaviour (=>          breaking), [mod!], [mod!!], etc. for attention
  [fix] - Fix broken behaviour (=> usu. non-breaking)
  [new] - Add new    behaviour (=>      non-breaking)
  [nop] - Unmodified behaviour (=>      non-breaking implementation or non-code changes, etc.)
  [x,y] - Single commit with multiple tags (in priority order), try avoid