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/bits/initializer.internal.h

@@ -0,0 +1,20 @@
+#ifndef COSMOPOLITAN_LIBC_BITS_INITIALIZER_H_
+#define COSMOPOLITAN_LIBC_BITS_INITIALIZER_H_
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+
+/* TODO: DELETE */
+
+/**
+ * Teleports code fragment inside _init().
+ */
+#define INITIALIZER(PRI, NAME, CODE)                               \
+  asm(".pushsection .init." #PRI "." #NAME ",\"ax\",@progbits\n\t" \
+      "call\t" #NAME "\n\t"                                        \
+      ".popsection");                                              \
+  textstartup optimizesize void NAME(char *rdi, const char *rsi) { \
+    CODE;                                                          \
+    asm volatile("" : /* no outputs */ : "D"(rdi), "S"(rsi));      \
+  }
+
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_BITS_INITIALIZER_H_ */