feat(beatmap,score): update beatmaps from Bancho & deleting scores (#50)

New API:

- DELETE /api/private/score/{score_id}: delete a score
- POST /api/private/beatmapsets/{beatmapset_id}/sync: request for syncing a beatmapset

New configuration:

- OLD_SCORE_PROCESSING_MODE

.env.example

@@ -68,12 +68,12 @@ GEOIP_UPDATE_HOUR=2
 # Game Settings
 ENABLE_RX=false
 ENABLE_AP=false
-ENABLE_ALL_MODS_PP=false
 ENABLE_SUPPORTER_FOR_ALL_USERS=false
 ENABLE_ALL_BEATMAP_LEADERBOARD=false
 ENABLE_ALL_BEATMAP_PP=false
 SEASONAL_BACKGROUNDS='[]'
 BEATMAP_TAG_TOP_COUNT=2
+OLD_SCORE_PROCESSING_MODE=normal
 
 # Beatmap Cache Settings
 ENABLE_BEATMAP_PRELOAD=true