Get Cosmopolitan into releasable state

A new rollup tool now exists for flattening out the headers in a way
that works better for our purposes than cpp. A lot of the API clutter
has been removed. APIs that aren't a sure thing in terms of general
recommendation are now marked internal.

There's now a smoke test for the amalgamation archive and gigantic
header file. So we can now guarantee you can use this project on the
easiest difficulty setting without the gigantic repository.

A website is being created, which is currently a work in progress:
https://justine.storage.googleapis.com/cosmopolitan/index.html

libc/testlib/testmain.c

@@ -18,7 +18,7 @@
 │ 02110-1301 USA                                                               │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/bits/bits.h"
-#include "libc/bits/safemacros.h"
+#include "libc/bits/safemacros.internal.h"
 #include "libc/calls/internal.h"
 #include "libc/log/log.h"
 #include "libc/nexgen32e/x86feature.h"
@@ -38,7 +38,7 @@ Flags:\n\
   -h         show this information\n\
 \n"
 
-STATIC_YOINK("die");
+STATIC_YOINK("__die");
 
 static bool runbenchmarks_;