汇率小工具

version 78:- add time format override (12 vs 24 hour) to global optionsversion 77:- add global options, ability to select port 80version 75:- add a main activity and sha512 testv73 and 74:- improve performance by reducing extraneous queries- remove ads to fix memory leakv72:- fix a couple rare crashesv71:- fix a couple relatively small UI glitchesv70:- NOTE: you will probably need to reconfigure or delete/add your widgets after this update!