log all unknown exceptions to wakatime.log file

wakatime/main.py

@@ -412,6 +412,7 @@ def execute(argv=None):
 
     setup_logging(args, __version__)
 
+    try:
         exclude = should_exclude(args.entity, args.include, args.exclude)
         if exclude is not False:
             log.debug(u('Skipping because matches exclude pattern: {pattern}').format(
@@ -468,3 +469,5 @@ def execute(argv=None):
         else:
             log.debug('File does not exist; ignoring this heartbeat.')
             return 0
+    except:
+        log.traceback()