Adding images

CentOS.md

@@ -2,6 +2,12 @@
 
 These were the options used to setup a CentOS development system. Use it as a guideline.
 
+#### CentOS Installation
+![CentOS Installation](https://github.com/mavlink/qgroundcontrol/blob/master/resources/CentOS/CentOS-installation.png)
+
+#### CentOS Software Selection
+![CentOS Software Selection](https://github.com/mavlink/qgroundcontrol/blob/master/resources/CentOS/CentOS-sw-selection.png)
+
 Once the system is fully installed and running, we need to set it up for QGC development. First, we need to update GStreamer to a more recent version. This guide follows Alice Wonder's tips found here: https://media.librelamp.com
 
 #### Update to a more current GStreamer
@@ -29,9 +35,10 @@ sudo yum install SDL2-devel
 ```
 
 #### Installing Qt
-
+```
 mkdir ~/devel
 cd ~/devel
+```
 
 Install Qt 5.12.4 from the Qt installation script which can be downloaded [here](https://www.qt.io/download-thank-you?os=linux&hsLang=en). Once downloaded, make it executable and run it:
 ```
@@ -40,6 +47,7 @@ chmod +x qt-unified-linux-x64-3.1.1-online.run
 ```
 
 Select the following options and install it under ~/devel/Qt
+![Qt Software Selection](https://github.com/mavlink/qgroundcontrol/blob/master/resources/CentOS/Qt-Setup.png)
 
 #### Clone and Build QGC
 ```
@@ -62,6 +70,8 @@ make -j32
 
 You can alternativelly launch QtCreator (found under `~/devel/Qt/Tools/QtCreator/bin/qtcreator`), load the `qgroundcontro.pro` project and build/debug from within its IDE.
 
+By default, this will build the regular QGC. To build the sample, customized UI version, follow [these instructions](https://github.com/mavlink/qgroundcontrol/blob/master/custom-example/README.md).
+
 #### Running QGC
 Before launching QGC, you need to make sure the current user has access to the dialout group (serial port access permission):
 ```