Demo test phase

1. click the “+” button
2. input items, carriage return
3. select the completed items and delete the delete key
   Note: there are currently no saving items, and the next version is updated
   MyEvents win10 UWPdemo, although UWP is not mature now, can not be achieved in some places (such as window style, the minimum window size, VSXAML, but this software crashes) will follow the UWP update to update and improve. Translation from Baidu