added scala-logging and avro4s (lauris#459)

* added scala-logging

logging library wrapping SLFJ
Lhttps://github.com/lightbend/scala-logging

* added avro4s to Serialization

https://github.com/sksamuel/avro4s

README.md

@@ -248,6 +248,7 @@ Projects with over 500 stargazers are in bold.
 *Libraries for serializing and deserializing data for storage or transport.*
 
 * [avro-codegen ★ 24 ⧗ 23](https://github.com/Nitro/avro-codegen) - Code generation from avro schemas to serialize/deserialize avro messages, no runtime reflection.
+* [Avro4s ★ 473](https://github.com/sksamuel/avro4s) - Avro schema generation and serialization / deserialization for Scala.
 * [Chill ★ 378 ⧗ 4](https://github.com/twitter/chill) - Extensions for the Kryo serialization library to ease configuration in systems like Hadoop and Storm.
 * [msgpack ★ 75 ⧗ 57](https://github.com/msgpack/msgpack-scala) - A efficient binary serialization library.
 * **[Pickling ★ 808 ⧗ 0](https://github.com/scala/pickling)** - Fast, customizable, boilerplate-free pickling support.
@@ -396,6 +397,7 @@ Projects with over 500 stargazers are in bold.
 * [LArray ★ 225 ⧗ 25](https://github.com/xerial/larray) - Large off-heap arrays (> 2GB) and mmap files.
 * [Log4s](http://www.log4s.org/) - Fast, Scala-friendly logging bindings on top of [SLF4J](http://slf4j.org/). Uses macros for extreme performance.
 * [LogStage ★ 75 ⧗ 0](https://github.com/7mind/izumi) - Zero-effort structural logger for Scala with [SLF4J] integration.
+* **[Scala-Logging ★ 707](https://github.com/lightbend/Scala-Logging)** - Convenient and performant logging library for Scala wrapping SLF4J.
 * **[Monocle ★ 757 ⧗ 0](https://github.com/julien-truffaut/Monocle)** - An Optics/Lens library for purely functional manipulation of immutable objects.
 * **[n-scala ★ 662 ⧗ 3](https://github.com/nscala-time/nscala-time)** - Scala wrapper for Joda Time.
 * [Persist-Logging ★ 33 ⧗ 48](https://github.com/nestorpersist/logging) - Comprehensive logging library for Scala.