Dependencies fix

[glynhudson]

• Update dependencies to fix Compilation errors trying to build the app  #63
• Rename compile to implementation as recomended by android studiio https://stackoverflow.com/questions/44493378/whats-the-difference-between-implementation-and-compile-in-gradle
• Remove buildToolsVersion since this is no longer used. Build tools version is autodetected from target sdk

[dexterbg]

Sorry, I've got those changes locally as well, but forgot to check them in. Studio stores the signing config including my passwords in the build.gradle, so I need to manually select the lines to commit. If you know how to separate the signing config from the build file, that would be appreciated.

[glynhudson]

In my other Android projects, the signing key store is separate from build.grade. I think this is the default way for new projects. Here's a guide for how to remove the signing key from build.gradle into a sperate keystore which is obviously more secure and easier to manage https://developer.android.com/studio/publish/app-signing#secure-shared-keystore

What's your release schedule for the app? When do expect to be able to release an update to the play store?

[dexterbg]

Thanks, I'll have a look. Release schedule is "when enough new features or important fixes have been added". I'm currently not working on the App, so you can basically decide.