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/runtime/grow.c

@@ -56,7 +56,7 @@
  * @note tiny programs might need to explicitly YOINK(realloc)
  * @see test/libc/runtime/grow_test.c
  */
-bool grow(void *pp, size_t *capacity, size_t itemsize, size_t extra) {
+bool __grow(void *pp, size_t *capacity, size_t itemsize, size_t extra) {
   void **p, *p1, *p2;
   size_t n1, n2;                 /* item counts */
   size_t t1, t2;                 /* byte counts */