Generic projection building for tile geometry

[gchoqueux]

The UVs's tile contain geographic projection. Currently, there are 2 projections : PM (Pseudo Mercator) and WGS84. The geometry vertex use WGS84. Ideally, the tile geometry shouldn't have notions of geographic projections but only generic UVs. The tile should be build according to the required projection systems.

We need a generic projection building to add only projection required and new projections (Lambert93...)

Task :
The tileProvider should build specific projections in function of projection's layer. The mechanism should use in object builder' tile and object Projection

[gchoqueux]

With the #939 (image oriented) #912 merging (shader chunk). It will be possible to define projections via the oriented images and displayed them easily with the chunk shader architecture.

[gchoqueux]

@mbredif have a work in progress to project all images sources on all GeometryLayer (terrain, buildings...). We're going to carry his work into iTowns.
@mbredif could you add link to your work?