Move tuple of frame table fields to a separate files in case we need it more places.

constants.py

@@ -0,0 +1,48 @@
+# Tuple of frames table fields
+db_frames_fields = ("id",
+"addresse",
+"alive",
+"altitude",
+"comment",
+"course",
+"created",
+"format",
+"frame",
+"from",
+"gpsfixstatus",
+"latitude",
+"longitude",
+"mbits",
+"messagecapable",
+"message_text",
+"msgNo",
+"mtype",
+"object_format",
+"object_name",
+"path",
+"phg",
+"phg_dir",
+"phg_gain",
+"phg_height",
+"phg_power",
+"phg_range",
+"posambiguity",
+"raw",
+"raw_timestamp",
+"speed",
+"station_call",
+"station_lat",
+"station_lon",
+"status",
+"subpacket",
+"symbol",
+"symbol_table",
+"telemetry",
+"timestamp",
+"to",
+"tEQNS",
+"tPARM",
+"tUNIT",
+"via",
+"weather",
+"wx_raw_timestamp")