Functional basic cartography tools

That was a long and dangerous piece of work, but now the system allows (for specific users) the add and change of specific universal element: protostar, star, planet and continent.

Other big improvement: visible universe on the index page of the Universe side, with every stars and planets animated and clickable (SVG wonders)

Main changes to come in the next iteration:
- (Quick) Grouping the stars into "galaxies", must be soft and easily alterable.
- (Long) Complete connexion with the SSD local music player [SAF side mostly, but also SSD]

When these two changes are implemented, the real Alpha should be released.