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/nt/thunk/paint.inc

@@ -0,0 +1,5 @@
+#define SetPixel(...) __imp_SetPixel(__VA_ARGS__)
+#define GetPixel(...) __imp_GetPixel(__VA_ARGS__)
+
+extern typeof(SetPixel) *const __imp_SetPixel __msabi;
+extern typeof(GetPixel) *const __imp_GetPixel __msabi;

libc/nt/thunk/runtime.inc

@@ -1,6 +1,3 @@
-#define ExitProcess(...) __imp_ExitProcess(__VA_ARGS__)
-extern typeof(ExitProcess) *const __imp_ExitProcess __msabi;
-
 #define FreeEnvironmentStrings(...) __imp_FreeEnvironmentStringsW(__VA_ARGS__)
 extern typeof(FreeEnvironmentStrings) *const
     __imp_FreeEnvironmentStringsW __msabi;