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/conv/itoa.h

@@ -2,9 +2,9 @@
 #define COSMOPOLITAN_LIBC_CONV_ITOA_H_
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
-
-/*
-
+/*───────────────────────────────────────────────────────────────────────────│─╗
+│ cosmopolitan § integer conversion                                        ─╬─│┼
+╚────────────────────────────────────────────────────────────────────────────│─╝
   FASTEST + TINY
 
   - uint64toarray_radix10(0x31337, a)         l: 68 (20ns) m: 112 (33ns)
@@ -14,9 +14,7 @@ COSMOPOLITAN_C_START_
 
   - snprintf(a, sizeof(a), "%d", 0x31337)     l: 199 (58ns) m: 421 (123ns)
   - uint128toarray_radix10(0x31337, a)        l: 93 (27ns) m: 141 (41ns)
-  - int128toarray_radix10(0x31337, a)         l: 96 (28ns) m: 173 (51ns)
-
-*/
+  - int128toarray_radix10(0x31337, a)         l: 96 (28ns) m: 173 (51ns) */
 
 size_t int64toarray_radix10(int64_t, char[hasatleast 21]);
 size_t uint64toarray_radix10(uint64_t, char[hasatleast 21]);