adjust root folder

ports/esp32/readme.txt

@@ -0,0 +1,66 @@
+Bacnet Server for Espressif ESP32
+	Steve Karg Bacnet stack using PlatformIO open source ecosystem for IoT development on VSCode or Atom
+	F. Chaxel 2017
+
+TODO list :
+
+(Install VSCode or Atom and add the PlatformIO extension)
+
+Edit platformio.ini to adjust board, Com Port, ...
+
+Goto lib/stack and copy the requested files from Steve code :
+
+   all .h from include directory (not all required by it's simple)
+
+   these .c files from src or demo/handlers
+	abort.c
+	address.c
+	apdu.c
+	bacaddr.c
+	bacapp.c
+	bacdcode.c
+	bacerror.c
+	bacint.c
+	bacreal.c
+	bacstr.c
+	bip.c
+	bvlc.c
+	cov.c
+	datetime.c
+	bacdevobjpropref.c
+	dcc.c
+	debug.c
+	h_cov.c
+	h_ucov.c
+	h_npdu.c
+	h_rp.c
+	h_rpm.c
+	h_whois.c
+	h_wp.c
+	iam.c
+	lighting.c
+	memcopy.c
+	noserv.c
+	npdu.c
+	proplist.c
+	reject.c
+	rp.c
+	rpm.c
+	s_iam.c
+	tsm.c
+	whois.c
+	wp.c
+
+Modify
+	in config.h
+		MAX_TSM_TRANSACTIONS 255, set the value to 10 for instances 
+	in main.c
+		wifi_config to fit your wifi network
+		BACNET_LED 5, set another IO number depending of your board
+
+A lot of Warning will be issued at compile time due to the redefinition of BIT macros.
+Could be removes by placing a #ifndef #BIT0 .. #endif arround the BIT macro in bits.h, 
+and moving to the top of include list
+	#include "datalink.h" in tsm.c, s_iam and in device.c
+	#include "net.h" in bip.c and in bip.h (redondant include in bip.c)
+	#include "bvlc.h" in bvlc.c