Updated for 2.8 version

Changed icons for:

- building_chamber_of_elevation_1, tier 1
- building_chamber_of_elevation_2, tier 2
- building_galactic_memorial_1, tier 1
- building_galactic_memorial_2, tier 2
- building_galactic_memorial_3, tier 3
- building_sacrificial_temple_1, tier 1
- building_sacrificial_temple_2, tier 2
- building_sacrificial_temple_3, tier 3

Updated for 2.7 version.

Changed icons for:

- building_machine_assembly_complex, tier 2
- building_bureaucratic_1, tier 1
- building_bureaucratic_2, tier 2
- building_bureaucratic_3, tier 3
- building_embassy, tier 1
- building_grand_embassy, tier 2

Removed changed icons for:

- building_citadel_of_faith, tier 4
- building_autocurating_vault, tier 4

(Looks like Paradox removed fourth tier of unity building upgrade option and this (former fourth tier) unity buildings now grant planet unity percent increase)


Problems:

- building_machine_assembly_plant now upgrades to building_machine_assembly_complex, but uses icon from robot_assembly_plant, which is not upgradable. Therefore building_machine_assembly_plant does not have tier 1 symbol

- Paradox have changed chain of unity buildings for Machine worlds, added new building_simulation_1, building_simulation_2, building_simulation_3 buildings, but they use building_holo_theatres, building_hyper_entertainment_forum and building_citadel_of_faith icons. It means third tier of this chain does not show tier number (I removed tier 4 symbol from building_citadel_of_faith, see above).

Updated for 2.5 version.

Changed icons for:

- building_stronghold, tier 1
- building_fortress, tier 2

Updated for 2.4 version.

Removed tier number from building_crystal_plant, 1 tier.

My reasons:

- Ability to upgrade this building is not granted by technology. It is an outcome of dlc event chain and should be rare.
- Other two strategic resource buildings don't have upgrades.
- In my opinion, it will be more pleasing to the eye to display Crystal Plant without tier number.

If anybody has any opinion or suggestions about it, you are welcome to write it in comments.

Updated for 2.3 version.

Changed icons for

- building_crystal_plant, tier 1
- building_crystal_plant_2, tier 2