Documentation links missing/wrong

All links in readme to  [the limited Reflekt DSL](https://github.com/JetBrains-Research/reflekt/blob/master/reflekt-dsl/src/main/kotlin/org/jetbrains/reflekt/Reflekt.kt) or [the extended SmartReflekt DSL](https://github.com/JetBrains-Research/reflekt/blob/master/reflekt-dsl/src/main/kotlin/org/jetbrains/reflekt/SmartReflekt.kt) are leading to 404