Translate vkgy

It is now possible to help translate the UI of vkgy into other languages. This feature is in alpha mode, so it's currently limited to VIP users.

• To change the language in which you browse vkgy, use the new dropdown at the top of the page. (The old toggle between English and Japanese has been preserved for non-VIP members, so you'll still see that one if you're signed out.)

• To propose translations in your language, or to vote on existing translations, visit the translations section (or open the language dropdown at the top of the page and click translate).

• This highest voted translations will be automatically accepted and appear on the site, while any translation with negative votes will be rejected.

• The list of languages is not finalized—feel free to give feedback about this. I'm not hoping to have every language possible, but rather a handful of languages that represent the vast majority of vkgy's userbase.

All changes

1. minor addition Made basic UI and database setup for allowing UI translations on vkgy.
2. minor addition Worked on voting for translations.
3. improvement Continued work on translations.
4. new feature Finished fixing translation vote script, made first draft at function to generate file with translations, and first draft at function to access translation files and swap strings.
5. improvement Added translation flat files to .gitignore.
6. minor addition Separated generation of translation flat file into its own function.
7. improvement Changed behavior of upvote_translation to auto accept or decline, and to auto regenerate translations file.
8. improvement Updated vote_translation to auto accept/reject and build translation file.
9. improvement Separated logic of translation page.
10. new feature Added ability to add/edit strings for translation.
11. new feature Finished second draft of function to get translations from flat file based on folder, and updated tr function to also grab Japanese if necessary, and to replace variables.
12. minor addition Added 'edit string' link on translations page and updated script so that it autopopulates form below.
13. bug fix Fixed another edge case with checkboxes.
14. bug fix Reverted header on main page.
15. improvement Created first test of tr function.
16. improvement Migrated several translation functions to own class.
17. minor addition Added helper functions for translation.
18. new feature Added language switcher helper function.
19. improvement Moved allowed languages string to translation class.
20. minor addition Added basic translation documentation.
21. improvement Updated documentation nav.
22. new feature Added first pass at language switching for VIP members.
23. bug fix Added array check before strlen in access_artist.
24. bug fix Updated old set_lang function to work with new language system. Will remove once all users can use new system.
25. bug fix Updated main nav links to specify folder when grabbing translation.
26. improvement Changed style of translation symbol.
27. minor addition Added German as allowed language. Changed way folder is grabbed if none specified.
28. improvement Updated translations page to only show sections that have strings.
29. new feature Added ability to filter translations by language. Also hid 'add string' block from most users.
30. improvement Updated translation script with additional filtering.
31. improvement Changed text and style of 'view' link on translations page. Also fixed bug with long English strings.