Added info about fixing black border & more examples

Added how to disable over scan removing the black bar for your raspberry pi, as well as linked to an article that includes more examples on how to use the project.

README.md

@@ -61,3 +61,16 @@ cd build
 qmake ../src/slide.pro
 make
 ```
+
+## Article on using slides
+
+```
+This article has more helpful ways that you could use this repo as a picture frame
+https://opensource.com/article/19/2/wifi-picture-frame-raspberry-pi
+```
+
+## Removing black border
+
+```
+if you find that you have a black border around your screen you can remove it by disabling overscan. This is done by editing /boot/config.txt and uncommenting disable_overscan=1 
+```