Add RB API helpers

rbConstants.py

@@ -0,0 +1,16 @@
+BASE_URL = "http://www.radio-browser.info/webservice/"
+
+endpoints = {
+    "countries": {1: "{fmt}/countries", 2: "{fmt}/countries/{filter}"},
+    "codecs": {1: "{fmt}/codecs", 2: "{fmt}/codecs/{filter}"},
+    "states": {
+        1: "{fmt}/states",
+        2: "{fmt}/states/{filter}",
+        3: "{fmt}/states/{country}/{filter}",
+    },
+    "languages": {1: "{fmt}/languages", 2: "{fmt}/languages/{filter}"},
+    "tags": {1: "{fmt}/tags", 2: "{fmt}/tags/{filter}"},
+    "stations": {1: "{fmt}/stations", 3: "{fmt}/stations/{by}/{search_term}"},
+    "playable_station": {3: "{ver}/{fmt}/url/{station_id}"},
+    "station_search": {1: "{fmt}/stations/search"},
+}