!!! Version 0.9.5 Released

Highlights of this release:

* New syntactic sugar "x?" and "x:=y" for reference reads and writes.
* Operators can be written in prefix form (or unapplied) using parentheses: "(+)" is equivalent to "lambda (a,b) = a+b".
* New "type" declaration for declaring algebraic data type constructors.
* Any combinator is allowed unparenthesized within if/then/else.
* Allow apostrophe in var names.
* Allow nested comments.
* Newline-sensitivity avoids ambiguity about where expressions end.

* Equality operator "=" now obeys substitutability principle.
* New semantics for semicolon operator: in "a ; b", "b" runs only if  "a" fails without publishing any values.
* Java fields can be accessed with the dot operator.

* Standard library organized, documented, and expanded with many more useful sites and definitions.
* Experimental support for "doc" tags ala javadoc, translated into docbook syntax by a special parser.

* Enforceable limits on recursive stack depth and logical threads.
* A closure only keeps variables used in the closure live, for garbage  collection purposes.
* Definitions are organized into mutually-recursive groups to keep environments small and avoid false depenendencies on futures introduced by the pruning combinator.