Explicitly expect significant digits in numerical data

[lvdbrink]

Official change request: OGC CR 579

Numerical data published using GeoSPARQL often have an unrealistic amount of digits. At the same time, there is no standardized way to express spatial resolution yet. Both these problems can be addressed when numerical data, published using GeoSPARQL, are explicitly expected to have only significant digits.

[jabhay]

MoSCoW poll created