Plugin development doc

doc/plugin_development.md

@@ -41,7 +41,7 @@ def plugin_exec(app, main_window):
     """
     # Place your init code here
     pass
-```icons
+```
 
 ## Building your plugin
 
@@ -50,6 +50,8 @@ To build the plugin, you need :
 ### To generate resources (images, qrc, ...)
 
 Generating resources uses [pyrcc5](http://pyqt.sourceforge.net/Docs/PyQt5/resources.html).
+Generating designer ui files uses [pyuic5](http://pyqt.sourceforge.net/Docs/PyQt5/designer.html).
+
 To help you generate your resources, you should copy the `gen_resources.py` file from sakia sources and configure the
  variable `gen_resources`. Replace `'src'` by the name of your plugin package.