HTML img tag instead of md, fixed links
* showcase: an overview of all widgets provided by OrbTk
* calculator: calculator example
- ![calculator](https://gitlab.redox-os.org/kivimango/assets/-/raw/orbtk_examples/screenshots/Calculator.png)
+ <img alt="calculator" src="https://gitlab.redox-os.org/redox-os/assets/-/raw/master/screenshots/Calculator.png">
* canvas: use third party render library in canvas
- ![canvas](https://gitlab.redox-os.org/kivimango/assets/-/raw/orbtk_examples/screenshots/orbtk_examples/canvas_example.jpg)
+ <img alt="canvas" src="https://gitlab.redox-os.org/redox-os/assets/-/raw/master/screenshots/orbtk_examples/canvas_example.jpg" />
* login: PasswordBox showcase with a login form
* minimal: minimal example
* multi_window: multi window example
- ![multi_window](https://gitlab.redox-os.org/kivimango/assets/-/raw/orbtk_examples/screenshots/orbtk_examples/multi_window.jpg)
+ <img alt="multi_window" src="https://gitlab.redox-os.org/redox-os/assets/-/raw/master/screenshots/orbtk_examples/multi_window.jpg" />
* overlay: draw widgets on the top
- ![overlay](https://gitlab.redox-os.org/kivimango/assets/-/raw/orbtk_examples/screenshots/orbtk_examples/overlay_example.jpg)
+ <img alt="overlay" src="https://gitlab.redox-os.org/redox-os/assets/-/raw/master/screenshots/orbtk_examples/overlay_example.jpg" />
* popup: show how to open and use a popup
* settings: use registry and settings service (load / save)
- ![settings](https://gitlab.redox-os.org/kivimango/assets/-/raw/orbtk_examples/screenshots/orbtk_examples/settings_example.jpg)
+ <img alt="settings" src="https://gitlab.redox-os.org/redox-os/assets/-/raw/master/screenshots/orbtk_examples/settings_example.jpg" />
* stack: stack layout example
* widgets: widget overview
