RFCA - Under New Management Code

- Fixed various problems with the Civilopedia, all entries and subcategories should work now
- Added new Stability Maps Civilopedia category (was already WIP), now you can check the stability map for all the 29 playable civs ingame
- Fixed wrong wondermovie link for Golden Buddha, Porcelain Tower, Pha That Luang
- Fixed some minor python coding mistakes and logical issues, a couple python exceptions
- Removed seriously outdated (duplicate) version of CvScreenInterface.py, probably caused some issues in the background
- Readded 4 missing (probably unintentionally) soundtracks for the 2nd era
- Added diplo sound for the Majapahit civ, was missing for some reason
- Fixed a couple typos, duplicate entries and wrong links in the sounds xml files
- Revised folder and name structure for all sounds in the mod, removed some unnecessary art and text files