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

third_party/lex/flexdef.h

@@ -2,7 +2,7 @@
 #include "libc/stdio/stdio.h"
 #include "libc/runtime/runtime.h"
 #include "libc/macros.h"
-#include "libc/calls/openbsd.h"
+#include "libc/calls/openbsd.internal.h"
 
 /*	$OpenBSD: flexdef.h,v 1.15 2015/11/19 23:48:06 tedu Exp $	*/
 

third_party/lex/main.c

@@ -56,8 +56,8 @@ asm(".include \"third_party/lex/COPYING\"");
 #include "libc/x/x.h"
 #include "libc/runtime/runtime.h"
 #include "libc/x/x.h"
-#include "libc/bits/safemacros.h"
-#include "libc/bits/safemacros.h"
+#include "libc/bits/safemacros.internal.h"
+#include "libc/bits/safemacros.internal.h"
 #include "tables.h"
 
 static char flex_version[] = FLEX_VERSION;