* added sounds to cityScreen
* changes? ..don't know how to name this commit
* removed try block
* improved era1 sound and added slider for city enter sounds
* added Information Era sound
* added Future Era sound
* better option name + translation
* added Atomic Era sound
* normalized sounds
* prevent spam + better era 0 and 1 sounds
* cleanup
* sound improvements to medieval and atomic
* volume now tied to sound effects
* improved information sound
* improved future sound
* sounds now stop if you exit the city screen
* improved Renaissance sound
* now in separate function
* now using the music controller
* better file names
* WLTK day sound + sounds are now configurable in Eras.json
* removed redundant setting and fixed comment
* added PlaySingle
* musicController no longer used
* Gdx.audio.newMusic is now used
* function name
* function are now in their own class
* CitySoundPlayer now has 1 instance in UncivGame and is hooked
* credits
* sounds loop
* loopable sounds
* updated credits
* fixed sound not stopping when changing city without leaving cityScreen
* changed WLTKNew sound
* added toggle for the sounds
* changed WLTK sound, removed music and made all tracks have the same volume
* addressed some of the issues
* addressed more issues
* increased sounds volume + volume slider
* made WLTK sound slightly quieter
* removed entry from Vanilla eras
* revert back to CitySoundPlayer.kt
* no more hooks
* removed unused stuff
* changees
* completly reverted MusicController
* and the MusicTrackChooserFlags
* fixed ESC not stopping sounds
* updated credits to mention the sounds are modified
* dispose()
* removed try block
* Refactor: Extract methods & reduce code duplication
* Refactor: Rename Sounds to SoundPlayer
* Refactor: Make UncivSound a data class
As far as I can see, UncivSoundConstants served no purpose
* Refactor: Reorder sounds
* Refactor: Split up ExtensionFunctions and move into own package
* Add multiplayer turn sound notification
* Refactor: Remove unnecessary double translation
* Refactor: Reduce code duplication
* Refactor: No if for boolean logic
* Improve horse and construction sound
* Update Credits.md
* Convert to mp3
* Delete construction.ogg
* Improve horse sound
By https://freesound.org/people/Kubuzz/sounds/347036/
* Update Credits.md
* Bring back to old "construction" sound
* Update Credits.md