tools.deploy.backend: with-variables need to be on the whole block
Refactor >list to be a generic word
lists: cleanup usings.
benchmark.reverse-complement.tests,mason.report.tests: fix for the test
cases so they write to temp files instead of in resource:
mason.report: dos2unix.
furnace.db: db-persistence needs a dispose word that delegates to its pool slot

tests in http.tests refactored using "with-words" so that they always
dispose any db-persistence instances they create.
VM: try and recover with a kernel error from the callback heap running out
VM: "formalize" the callback_heaps object allocation using a
bump_allocator<code_block>

The advantage of doing it this way is that you can reuse the existing
each_object method to iterate all callbacks
VM: use a free_list_allocator for the callbacks, that way they can
individually be freed
VM: new primitive (callback-room) for querying the VM about memory usage

The word works exactly like (code-room) except it looks at the memory
usage in the callback heap instead of the code heap.
stack-checker.known-words: stack effect for <callback> is switched, it
should be ( word integer -- alien )
VM: new primitive free-callback which is able to free a callback
previously allocated using <callback>
alien: a test and docs for free-callback
stack-checker.alien: use free-callback as a destructor when creating
callbacks

+ tests proving it works. now in case you create temporary callbacks you
can enclose them in with-destructors and it will just work(tm).
alien,stack-checker.alien: move callback-destructor to the alien vocab

It can't be placed in stack-checker.alien because that vocab isn't
included in deployed images which lead to weird errors when the
destructors trigger.
compiler.tests.alien: wrap all callback tests in special
unit-test-with-destructor blocks, that way they dont leak memory in the
callback heap
build system: initial files for building using waf
buildable on linux, though the binary is corrupt
waf needs resource files end with .rc and specify paths relative to their own directory
attempt to include resource file in windows build