Remove unneeded dependency core -> fnGen

After this change:

```
    <dependencies>
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>2.11.7</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.4</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.novocode</groupId>
            <artifactId>junit-interface</artifactId>
            <version>0.10</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
```

Fixes #52

Author: retronym

build.sbt

@@ -24,7 +24,6 @@ lazy val fnGen = (project in file("fnGen")).
   )
 
 lazy val root = (project in file(".")).
-  dependsOn(fnGen).
   settings(scalaModuleSettings: _*).
   settings(commonSettings: _*).
   settings(