New features

[Angelk90]

Hi @florent37 : It would be possible to add the following features:

1. Set min and max.
2. Change the symbol
3. Set the color of the speech bubble
4. Set the color of the comic book text
5. Set the color of the start and end text
6. Set the color of the seek, in this case it is always white
7. Set the color of the part of the bar not selected, in this case it is gray.

All through xml.

The version com.github.florent37: android-slidr: 1.0.4, does not work is not installed.