Replace compile with Implementation in Gradle

[attanasio94g]

As title says because of this:
"Configuration 'compile' is obsolete and has been replaced with 'implementation'.
It will be removed at the end of 2018"

[tedbjorklund1]

I have the same problem. After changing "compile" to "implementation" I can't import the library anymore. The import is marked red and RateThisApp in the code can't be used. Any ideas on a solution?