Hide chaff from gnu make for `make showbuilddir`

Without this, we could get

	make: Entering directory `<stem>'
	<stem>/build/<arch>
	make: Leaving directory `<stem>'

instead of

	<stem>/build/<arch>
Run closure compiler where we can
Drop explicit CORRECT_OVERFLOWS=0

This is overridden when producing asm.js (default) anyway, so we can avoid a
warning message if we stop setting it.
Add gzip dist target
Add zip dist target
Drop interp-word pointer in ENTER
Fit forth into guaranteed RAM space
Update GTKWave operations map
Improve GTKWave disassembly script
Map tenyr FSM states for GTKWave
Count instructions to aid debugging
Use enum identifiers for GTKWave ops map
Cosmetics
Reduce wait in ramwrap by 1 cycle

Comparing cheaply using masks allows us to unregister the address lines.
Remove unused and unnecessary verilog defines
Inline APROPOS macro
We need _BSD_SOURCE for timercmp()
Switch to static allocation for VPI sim state
Update XISE project file with to match 5a1946e7

Update paths and settings that have diverged from Tenyr.prj.

Drop seqID from .xise. They're always regenerated these days anyway.