Alpha3

Alpha3 released to fix this problem: #2

Also I implemented a temporary fix to be able to run this app on Android N developer preview 2.

Attention: to release this version, I decided to sacrifice code refactoring made some months ago, because I prefer to release a stable version.

Also, there are problems related to recyclerview/cardview if you'll update the dependencies to the latest versions. Why? I don't know. Probably there is a bug in my code (that magically was ok in the past), or there is a bug in the latest support library (difficult to imaging, but it's possibile :)). For this reasons, don't updated dependencies! I'll investigate :)

PS: all previous releases (also APK) are totally broken, because compiled with "broken" dependencies :)