load settings from db, use api to change settings

+ add route to get all settings
+ add route to set any setting
+ add untested migration to add settings into settings db
+ compress json in api responses using FlaskCompress
+ serve gziped assets if browser accepts encoded files
+ misc

app/setup/__init__.py

@@ -1,11 +1,13 @@
 """
 Prepares the server for use.
 """
+from app.db.sqlite.settings import load_settings
 from app.setup.files import create_config_dir
 from app.setup.sqlite import run_migrations, setup_sqlite
 from app.store.albums import AlbumStore
 from app.store.artists import ArtistStore
 from app.store.tracks import TrackStore
+from app.utils.generators import get_random_str
 
 
 def run_setup():
@@ -13,6 +15,14 @@ def run_setup():
     setup_sqlite()
     run_migrations()
 
-    TrackStore.load_all_tracks()
-    AlbumStore.load_albums()
-    ArtistStore.load_artists()
+    try:
+        load_settings()
+    except IndexError:
+        # settings table is empty
+        pass
+
+    instance_key = get_random_str()
+
+    TrackStore.load_all_tracks(instance_key)
+    AlbumStore.load_albums(instance_key)
+    ArtistStore.load_artists(instance_key)