added librdkafka.redist note (#1047)

* added librdkafka.redist note

* removed space

* remove nl

Author: mhowlett

README.md

@@ -51,6 +51,7 @@ To add a reference to a dotnet core project, execute the following at the comman
 dotnet add package -v 1.2.0-RC3 Confluent.Kafka
 ```
 
+Note: `Confluent.Kafka` depends on the `librdkafka.redist` package which provides a number of different builds of `librdkafka` that are compatible with [common platforms](https://github.com/edenhill/librdkafka/wiki/librdkafka.redist-NuGet-package-runtime-libraries). If you are on one of these platforms this will all work seamlessly (and you don't need to explicitly reference `librdkafka.redist`). If you are on a different platform, you may need to [build librdkafka](https://github.com/edenhill/librdkafka#building) manually (or acquire it via other means) and load it using the [Library.Load](https://docs.confluent.io/current/clients/confluent-kafka-dotnet/api/Confluent.Kafka.Library.html#Confluent_Kafka_Library_Load_System_String_) method.
 
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