WHAT'S NEW

* Complete re-design of introduction screen, adding an option to rate the application.
* In drawing screen we did re-design some of the buttons, also adding several new features:
- Camera,
- Share option,
- Possibility to change background colours,
- Brush size increased to 40,
- Two new colours in the colour pallet,
- Drawing area increased by 2%.
Also, now when the colour has been picked, slider background will change colour so the user is familiar which colour is he currently using.