[gameplay] Tweak mace, ptol, sele specific structures
- Make the library a Ptolemaic exclusive. The tech discount is 15% unstackable.
- Enable Theater for Ptolemy & Seleucid, tweak stats.
- 'Hellenistic Metropolis' is now in the Civil Centre, and no longer affects military colonies/crannogs.
- The Ptolemaic lighthouse no longer reveals all shores, instead simply has a very large vision range. It's moved to City Phase.
- The Carthaginian super dock is moved to city pahse as well.
Patch by: Nescio
Differential Revision: https://code.wildfiregames.com/D3350