spring-xd: formula to brew install spring-xd

Spring XD makes it easy to solve common big data problems such as data ingestion and export, real-time analytics, and batch workflow orchestration. By building on mature, open source projects such as Spring Integration, Data and Batch, Spring XD will simplify the process of creating real-word big data solutions.

spring-xd formula installs Spring XD component locally along with redis dependency as needed.