Android package name causes conflicts with other modules in release builds

[tailorem]

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.reactlibrary">

</manifest>

The package name com.reactlibrary is generic and causes conflicts with other modules (such as custom modules or other libraries that also use the default package name) resulting in build failures.

[nzagorchev]

#46