Support both touch and mouse on same target platform (touch for Web Assembly target)

[clinuxrulz]

Hi @SergioRibera,

This is a suggestion for allowing touch events from the mobile browser for the Web Assembly target.
On touch screen laptops, they can use either touch or mouse.

• When touch is interacting with joystick, mouse events are ignored until touch interaction stops.
• When mouse is interacting with joystick, touch events are ignored until mouse interaction stops.

This is ready for merge if you are happy with the solution.

[clinuxrulz]

Also the mobile web browser will emulate some mouse events from touch events. The filtering of events stop event double up for the browser target.

[SergioRibera]

I'm loving this PR because it's something I've been planning to do for a while, let me know what you think about the comment I made in the review or if you can think of any other case for which the enum could be useful

[SergioRibera]

And one last favor, run a cargo fmt --all to fix the IC problems so we can unify the PR

[clinuxrulz]

Thank you for having a look. I agree with your comment. enum TouchOrMouse is now just is_mouse: bool.

[SergioRibera]

Thank you very much for the changes, right now I'm unifying the changes, I don't think I will release a new version soon, so I recommend you to use the dependency from github and in the main branch until I release a new version, on the other hand I invite you to continue contributing to the project :D