python-for-android fails to write project.properties if the dist name has a space

[inclement]

Reported at kivy/buildozer#531 (comment)

Not sure if the fix is to make the space work, or forbid spaces in the dist name (this would be necessary if there are problems with the java build tools or something).

[KeyWeeUsr]

Maybe just limit the dist name to a-z + A-Z and don't care about it. I doubt it's recommended to use spaces in such stuff (_ instead) and it'd be even a safety-switch against non-ascii characters.

[inclement]

I don't think we should forbid things if there isn't a technical reason for it, especially not forbidding non-ascii characters.