20150428 - v1.7 -fixed invalid c string pointer -font finetune
20150423 - v1.6 -fix memory leak when exit -display weekday, day and month
v1.5: Black or white setting.
20150413 - v1.4 crop item when XX:00 or for faster visual response.
20150412 - v1.1 fine-tune request timing.
20150411 - initial release