I04_1-152: added docs for icons

Author: IsabellaRey

README.md

@@ -24,6 +24,7 @@ This section serves as an introduction for developers who are interested in main
 * [Data Matrix Reading](docs/datamatrix-reader.md)
 * [Unipuck Geometry Calculation](docs/unipuck.md)
 * [Camera Scanning](docs/scanning.md)
+* [Icons Tips](docs/icons_tips.md)
 
 Release Notes
 -------------

docs/icons_tips.md

@@ -0,0 +1,8 @@
+Icons Tips
+==========
+
+The icons used in the application are mostly standard system icons. They can be found under QtGui.QStyle, e.g. QtGui.QStyle.SP_MediaPlay.
+A list of icons is available [here](https://deptinfo-ensip.univ-poitiers.fr/ENS/pyside-docs/PySide/QtGui/QStyle.html?highlight=qstyle#PySide.QtGui.PySide.QtGui.QStyle.StandardPixmap).
+
+To view them quickly, you can run the following code (taken from [here](https://joekuan.wordpress.com/2015/09/23/list-of-qt-icons/)):
+