Modified the Readme.txt (old comments were there before)

wrap/Exif/Readme.txt

@@ -1,6 +1,13 @@
-How to read exif metadata from a jpg file:
-- add "echo INCLUDEPATH += %rootrel%/code/lib/exif/include>> %filename%"
-  and "echo SOURCES += %rootrel%\code\lib\exif\*.cpp>> %filename%" to pmake.bat
-- include "jhead.h";
-- invoke ::ProcessFile(filename);
-- get the available information from the "ImageInfo" global variable of type ImageInfo_t, which is defined in jhead.h.
+How to read exif metadata from a jpg file.
+ = = = = = = = = = = = = = = = = = = = = =
+
+1- In your .pro file, define the EXIF_DIR variable which locates the Exif directory in your system, and include the exif.pri file
+e.g.
+  EXIF_DIR = ./yourSandboxPath/Exif
+  include($$EXIF_DIR/exif.pri)
+
+2- In your source file (where you need the exif reader), add:
+  #include "jhead.h"
+Then, invoke:
+  ::ProcessFile(filename);
+and get the available exif information from the "ImageInfo" global variable of type ImageInfo_t, defined in jhead.h.