* `local` and `global` now treat right hand side declarations equivalent to `:=`

* added `write`, which is like `print` but does not append a newline character

* `:=` has now precedence over infix expressions
* `:=` expands expression as block, supporting use of `if` and other block macros

* as infix operations have precedence over `:=`, `:=` is now additionally implemented as infix operator so it can be used like before

* `:=` is now implemented by the list wildcard handler
* `:=` accepts multiple left-hand arguments
* `as:=` auto-wraps right hand arguments as well

* `define-infix*` permits the declaration of greedy infix operators that receive all right hand side elements of the expression
* `:=` now also accepts non-infix expressions on the right hand side and auto-wraps them

* simplify recognizing infix expressions: a second expression value matching an infix symbol triggers infix parsing. Otherwise the list is not treated as an infix expression. This also allows us to define greedy infix operators.

* fixed blatant DRY violation

expander: fix crash when using an unknown symbol as a try clause

* updated eo to 0.12

* `..` operator for arrays: only concatenate with other arrays

* `&` prefix for strings produces a rawstring

* fixed `from ... let` returning arguments in reverse order

* fixed broken repr for enums

* constant string objects can be implicitly cast to `zarray`

merge

* fixed `static-error`

* win32: updated clang recipe to also include libxml2

* added `sc_scope_any_next` iterator for scope objects
* `'all scope` returns a generator that iterates all scope keys and values

* docstring: improved `help` to also cover type attributes and print the contents of types and modules
* docstring: added `helpstring` function