FCM client

Forked from google/fcm, but kept only the HTTP client part.

I did this, because I needed support for content_available and FCM, which were both added in master branch, which has not been released yet.

<dependency>
    <groupId>com.bertoncelj</groupId>
    <artifactId>fcm-client</artifactId>
    <version>1.1.0</version>
</dependency>

See original project's readme for other info.