- change behavior to keep obj on stack

- add VAR_DEREF_IMM node type (immediate/non-defered var deref)
- add node source location info
- add VarDerefImmediate and NonWordExpr grammar rules
- add more aliases for built-ins

- load/loadkey throws error if var doesn't exist

…ammar

- revert / remove NodeType.VAR_DEREF_IMM
- add resolveNode, resolveArray, resolveMap
- update resolveVar to use hasOwnProperty() check
- simplify VisitorState and handling
- add source location handling (for improved error msg)
- update aliases

…d docs

- rename resolveMap => resolveObject
- rename visitMap => visitObject

- add loadvar/storevar/beginvar/endvar word fns
- add `^{ x y }` syntax to autobind word local vars
- update var lookups/updates to use scope/binding stack (per var)
- update visitWord() to inject local var handling (if needed)
- update ensureEnv() to prepare var stacks
- add finalizeEnv() to resolve final var results and remove var stacks
- fix aliases
- add docs

* feature/pointfree-lang:
  docs(pointfree-lang): update readme
  feat(pointfree-lang): implement dynamic var scoping & local var grammar
  refactor(pointfree-lang): rename grammar rule / nodetype MAP=>OBJ, add docs
  fix(pointfree-lang): update grammar (parse order), add tests
  feat(pointfree-lang): overhaul visitor quote/array & map handling, grammar
  feat(pointfree): add math ops, update load/loadkey, update tests
  refactor(examples): update pf svg example
  feat(pointfree-lang): update grammar, aliases, ASTNode, NodeType

 - @thi.ng/pointfree-lang@0.2.0
 - @thi.ng/pointfree@0.7.0

 - @thi.ng/api@2.1.3
 - @thi.ng/atom@1.2.3
 - @thi.ng/bitstream@0.4.3
 - @thi.ng/checks@1.3.2
 - @thi.ng/csp@0.3.24
 - @thi.ng/dcons@0.1.18
 - @thi.ng/dgraph@0.0.2
 - @thi.ng/diff@1.0.5
 - @thi.ng/hdom-components@1.1.2
 - @thi.ng/hdom@2.3.3
 - @thi.ng/hiccup-css@0.1.8
 - @thi.ng/hiccup@1.3.3
 - @thi.ng/interceptors@1.1.3
 - @thi.ng/iterators@4.1.3
 - @thi.ng/paths@1.1.4
 - @thi.ng/pointfree-lang@0.2.1
 - @thi.ng/pointfree@0.7.1
 - @thi.ng/resolve-map@0.1.5
 - @thi.ng/rle-pack@0.2.12
 - @thi.ng/router@0.1.4
 - @thi.ng/rstream-csp@0.1.43
 - @thi.ng/rstream-log@0.6.3
 - @thi.ng/rstream@1.2.3
 - @thi.ng/transducers@1.7.4