Add stream dev guide and samples chapters

Fixes #1817
Fixes #1816

Author: markpollack

spring-cloud-dataflow-docs/src/main/asciidoc/index.adoc

@@ -39,8 +39,10 @@ include::configuration.adoc[]
 include::shell.adoc[]
 include::streams.adoc[]
 include::streams-skipper.adoc[]
+include::streams-developer-guide.adoc[]
 include::tasks.adoc[]
 include::dashboard.adoc[]
+include::samples.adoc[]
 include::api-guide.adoc[]
 include::appendix.adoc[]
 

spring-cloud-dataflow-docs/src/main/asciidoc/samples.adoc

@@ -0,0 +1,26 @@
+[[dataflow-samples]]
+= Samples
+
+Several samples have been created to help you get started implementing higher level use cases than the basic Streams and Tasks shown in the reference guide.
+The samples are part of separate https://github.com/spring-cloud/spring-cloud-dataflow-samples[repository] and have their own https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/[reference documentation].
+
+.Streams
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_streaming.html#spring-cloud-data-flow-samples-http-cassandra-overview[HTTP to Cassandra]
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_streaming.html#_http_to_mysql_demo[HTTP to MySQL]
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_streaming.html#_http_to_gemfire_demo[HTTP to Gemfire]
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_streaming.html#_gemfire_cq_to_log_demo[Gemfire CQ to Log Demo]
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_streaming.html#_gemfire_to_log_demo[Gemfire to Log Demo]
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_streaming.html#_custom_spring_cloud_stream_processor[Custom Processor]
+
+.Task and Batch
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_task_batch.html#_batch_job_on_cloud_foundry[Batch Job on Cloud Foundry]
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_task_batch.html#_batch_file_ingest[Batch File Ingest]
+
+.Analytics
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_analytics.html#spring-cloud-data-flow-samples-twitter-analytics-overview[Twitter Analytics]
+
+.Data Science
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_data_science.html#_species_prediction[Species Prediction]
+
+.Functions
+* https://docs.spring.io/spring-cloud-dataflow-samples/docs/current/reference/html/_functions.html#_functions_in_spring_cloud_data_flow[Using Spring Cloud Function]