- added a first new example script and added some files to work with
- added a new parameter that will store the home folder of the FlatCAM installation so we can access the example folder
- in PreferencesUI.PreferencesUIManager class I removed the need to pass reference to the App class since it this was available through the 'ui' parameter
- some fixes due to recent refactoring
- minor bugs fixed (not so visible)
- promoted some methods to be static
- set the default layout on first run to the 'minimal' value