magic: bindings for libmagic.
magic: some minor fixes.
magic.ffi: look for "magic" (works better on linux).
io.launcher.windows: Make unit tests show that process fails rather than
reporting bogus error. Fixes #1152 (it wasn't really a bug, just bad
tests).
compiler.*: doc improvements
compiler.codegen.gc-maps: initial docs
cpu.architecture: %save-context example
stack-checker,compiler: docs for stack-checker and compiler words
compiler.cfg.*: more docs, tests and a small refactoring of the
admissible-registers word
compiler,cpu: more docs
cpu.*: docs and tests for words in the assembler
compiler.codegen.*: help for resolve-label misplaced -- move it
compiler.cfg.*: more stub docs for cfg construction words
Docs: fixing smaller help-lint nitpicks
compiler.codegen.gc-maps: update docs so that they match how factors gc-maps currently work
compiler: resolve duplicate doc for "compiled".
stack-checker: make this an unchecked-example.
cpu.x86.assembler.operands: fix help-lint.
FUEL: fix in table rendering, previously it cutted off some cells with to much text
alien,stack-checker.alien: new word with-callback

Since callbacks aren't automatically deallocated this word intends to
make sure "inline" callbacks are.