* compiler.C: generate struct declarations before procs

* renoir: extended CFUNCTION, added CVARIADIC, VATYPEPARAM, ANCHOROF
* compiler: proper handling of captured VA in closures, validate pcall argument count

* compiler: renamed UPVAL to UPATTR

* compiler: added location tag to upvals
* compiler.reduce: fold VA in arguments
* compiler.validate: report unresolved upvals

* checked in NOIR docs

* compiler: work on VA, COUNTOF, SLICE

* compiler: `attrof` does the job of `replaceof`

* compiler: more work on compile time expansion, instance attribute access

* compiler: added FOLDOP2

* compiler: added DEP factor for reducer, allowing to query and set dependencies on effects

* compiler: renamed COPYMACRO to INSTANCE, made it key; added IDPAIR to create keys; SIDEOP? to query side effects

* compiler: reducer rules can be sorted into fixpoint stages

* compiler: fixed aliasing issue when copying macro

* compiler: ALIAS nodes are resolved by schema, schedule and target

* compiler: fixed inattrs being reset, added --trace-reducer, KINDOF

* compiler: inline -> instance, UNUSED effect

* compiler: REPLACEOF, replace alias elision

* compiler: fixed wrong size determination of inline effects in Index

* compiler: RENOIR now maintains the state of VA buffers within a top level rule; they must be manually cleared using `VACOUNT n 0`.
* compiler: distinguished index based VA access from key based access (`VAMAP`)
* compiler: validator detects unsized effects in any macros reachable from top level functions

* compiler: validator rules produce their first output