Added 'proxmark.sh' from joanbono and entry in changelog

CHANGELOG.md

@@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
 This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
 
 ## [unreleased][unreleased]						
+ - Modified 'install.sh' script to work in macOS and Linux + added the 'update.sh' and 'proxmark3.sh' from joanbono (@TomHarkness)	 
  - Fix 'hf emv' - some cards need to have Le=0x00, some need to not to have (@merlokk)
  - Fix 'hf legic'  enhancement of rx / tx in legic commands (@drandreas)
  - Fix 'data buffclear' - now frees bigbuff also (@iceman)
@@ -339,5 +340,3 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac
 ### Added
 - iClass functionality: full simulation of iclass tags, so tags can be simulated with data (not only CSN). Not yet support for write/update, but readers don't seem to enforce update. (holiman).
 - iClass decryption. Proxmark can now decrypt data on an iclass tag, but requires you to have the HID decryption key locally on your computer, as this is not bundled with the sourcecode.
-
-

proxmark3.sh

@@ -10,5 +10,23 @@ function wait4proxmark {
 	echo $PM3
 }
 
+function wait4proxmark_macOS {
+	echo >&2 "Waiting for Proxmark to appear..."
+	while true; do
+		PM3=$(ls /dev/pm3-* /dev/cu.usbmodem* 2>/dev/null | head -1)
+		if [[ $PM3 != "" ]]; then
+			#echo >&2 -e "Found proxmark on $(ls /dev/pm3-* /dev/cu.usbmodem* 2>/dev/null | head -1)\n"
+			break
+		fi
+		sleep .1
+	done
+	echo $PM3
+}
+
 # start proxmark with first detected interface
-client/proxmark3 $(wait4proxmark)
+
+if [[ $(uname | awk '{print toupper($0)}') == "LINUX" ]]; then
+    client/proxmark3 $(wait4proxmark_Linux)
+elif [[ $(uname | awk '{print toupper($0)}') == "DARWIN" ]]; then
+    client/proxmark3 $(wait4proxmark_macOS)
+fi