Added build informations

Author: corna

README.md

@@ -1,2 +1,29 @@
 # pcb2gcodeGUI
-A simple GUI for pcb2gcode
+A simple GUI for pcb2gcode. 
+The minimum required Qt's version is 5.0.2.
+After building it, download and install pcb2gcode
+from https://github.com/patkan/pcb2gcode
+
+## Build
+### Build on Debian Jessie/Sid, Ubuntu Trusty/Utopic/Vivid
+    
+    sudo apt-get install git qt5-default
+    git clone https://github.com/Corna/pcb2gcodeGUI.git
+    cd pcb2gcodeGUI/
+    qmake
+    make
+
+Now just run the built executable with
+
+    ./pcb2gcodeGUI
+
+### Build on Debian Wheezy
+You need wheezy-backports: add this line to /etc/apt/sources.list
+
+	deb http://ftp.debian.org/debian/ wheezy-backports main
+
+and do an apt-update
+
+	sudo apt-get update
+
+then follow the instructions for Debian Jessie