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/alg/bisect.internal.h

@@ -0,0 +1,29 @@
+#ifndef COSMOPOLITAN_LIBC_ALG_BISECT_H_
+#define COSMOPOLITAN_LIBC_ALG_BISECT_H_
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+COSMOPOLITAN_C_START_
+
+forceinline void *bisect(const void *k, const void *data, size_t n, size_t size,
+                         int cmp(const void *a, const void *b, void *arg),
+                         void *arg) {
+  int dir;
+  const char *p, *pos;
+  p = data;
+  while (n > 0) {
+    pos = p + size * (n / 2);
+    dir = cmp(k, pos, arg);
+    if (dir < 0) {
+      n /= 2;
+    } else if (dir > 0) {
+      p = pos + size;
+      n -= n / 2 + 1;
+    } else {
+      return (void *)pos;
+    }
+  }
+  return NULL;
+}
+
+COSMOPOLITAN_C_END_
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_ALG_BISECT_H_ */