Redesign cosmocc toolchain

The `cosmocc` compiler is now being distributed as a self-contained
toolchain that's path-agnostic and it no longer requires you clone the
Cosmop repo to use it. The bin/ folder has been deleted from the mono
repo. The `fatcosmocc` command has been renamed to `cosmocc`. MacOS
support now works very well.

ape/apeuninstall.sh

@@ -1 +0,0 @@
-../bin/ape-uninstall

ape/apeuninstall.sh

@@ -0,0 +1,64 @@
+#!/bin/sh
+
+PROG=${0##*/}
+MODE=${MODE:-$m}
+COSMO=${COSMO:-/opt/cosmo}
+COSMOS=${COSMOS:-/opt/cosmos}
+
+if [ ! -f ape/loader.c ]; then
+  cd "$COSMO" || exit
+fi
+
+if [ "$UID" = "0" ]; then
+  SUDO=
+else
+  SUDO=sudo
+fi
+
+{
+  echo
+  echo "APE Uninstaller intends to run (in pseudo-shell)"
+  echo
+  echo "    sudo echo -1 into /proc/sys/fs/binfmt_misc/APE*"
+  echo "    sudo rm -f /usr/bin/ape ~/.ape /tmp/.ape # etc."
+  echo
+  echo "You may then use ape/apeinstall.sh to reinstall it"
+  echo
+} >&2
+
+set -ex
+for f in /proc/sys/fs/binfmt_misc/APE*; do
+  if [ -f $f ]; then
+    $SUDO sh -c "echo -1 >$f" || exit
+  fi
+done
+
+# system installation
+if [ -f /usr/bin/ape ]; then
+  $SUDO rm -f /usr/bin/ape
+fi
+if [ -f /usr/local/bin/ape ]; then
+  $SUDO rm -f /usr/local/bin/ape
+fi
+
+# legacy installations
+rm -f o/tmp/ape /tmp/ape "${TMPDIR:-/tmp}/ape"
+
+# ad-hoc installations
+for x in .ape \
+         .ape-1.1 \
+         .ape-1.3 \
+         .ape-1.4 \
+         .ape-1.5 \
+         .ape-1.6 \
+         .ape-1.7 \
+         .ape-1.8 \
+         .ape-1.9 \
+         .ape-blink-0.9.2 \
+         .ape-blink-1.0.0; do
+  rm -f \
+     ~/$x \
+     /tmp/$x \
+     o/tmp/$x \
+     "${TMPDIR:-/tmp}/$x"
+done