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/periodic_scan.py

@@ -3,14 +3,10 @@ This module contains functions for the server
 """
 import time
 
-from app.logger import log
 from app.lib.populate import Populate, PopulateCancelledError
-
-from app.utils.generators import get_random_str
-from app.utils.network import Ping
-from app.utils.threading import background
-
 from app.settings import ParserFlags, get_flag, get_scan_sleep_time
+from app.utils.generators import get_random_str
+from app.utils.threading import background
 
 
 @background
@@ -21,14 +17,13 @@ def run_periodic_scans():
     # ValidateAlbumThumbs()
     # ValidatePlaylistThumbs()
 
-    try:
-        Populate(key=get_random_str())
-    except PopulateCancelledError:
-        pass
+    run_periodic_scan = True
+
+    while run_periodic_scan:
+        run_periodic_scan = get_flag(ParserFlags.DO_PERIODIC_SCANS)
 
-    while get_flag(ParserFlags.DO_PERIODIC_SCANS):
         try:
-            Populate(key=get_random_str())
+            Populate(instance_key=get_random_str())
         except PopulateCancelledError:
             pass