Update installer logic

Author: supechicken

install.sh

@@ -1,20 +1,14 @@
 #!/bin/bash -eu
-
 if [ -n "${CREW_DEST_PREFIX}" ]; then
   INSTALL_PREFIX="${CREW_DEST_PREFIX}"
 else
   : "${INSTALL_PREFIX:=/usr/local}"
 fi
 
-if [ ${EUID} != 0 ] && [ ! -w ${INSTALL_PREFIX} ]; then
-  echo "Please run this script as root." 2>&1
-  exit 1
-fi
+mkdir -p ${INSTALL_PREFIX} ${INSTALL_PREFIX}/{lib,bin}
 
-mkdir -p ${INSTALL_PREFIX}/lib
 cp -r . ${INSTALL_PREFIX}/lib/crew-sudo
 
-mkdir -p ${INSTALL_PREFIX}/bin
 ln -sf ../lib/crew-sudo/crew-sudo ${INSTALL_PREFIX}/bin/crew-sudo
 ln -sf ../lib/crew-sudo/crew-sudo ${INSTALL_PREFIX}/bin/sudo
 
@@ -26,4 +20,5 @@ if [ -d ${INSTALL_PREFIX}/etc/env.d ]; then
 else
   # installing without chromebrew, append the autostart script to bashrc
   echo "source ${INSTALL_PREFIX}/lib/crew-sudo/autostart/crew-sudo.sh" >> ~/.bashrc
+  echo -e '\e[1;32m''crew-sudo installed!''\e[0m'
 fi