Various general cleanups

Mostly from the L6470-oriented PR

buildroot/share/atom/auto_build.py

@@ -105,6 +105,7 @@ current_OS = platform.system()
 target_env = ''
 board_name = ''
 
+from datetime import datetime, date, time
 
 #########
 #  Python 2 error messages:
@@ -892,6 +893,8 @@ def run_PIO(dummy):
     write_to_screen_queue('\nBoard name: ' + board_name  + '\n')  # put build info at the bottom of the screen
     write_to_screen_queue('Build type: ' + build_type  + '\n')
     write_to_screen_queue('Environment used: ' + target_env  + '\n')
+    write_to_screen_queue(str(datetime.now()) + '\n')
+
 # end - run_PIO