Twitter functional apps

* Streaming source
* Add twitter search and messasge sources
* Add more twitter source, sink and processors
* Add IT tests for twitter update sink
* Add IT tests for twitter message sink
* Add IT tests for twitter trend processor
* twitter suppliers readme
* twitter consumers readme
* twitter functions readme
* Disable TwitterStreamSourceTests

functions/function/twitter-function/pom.xml

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<artifactId>twitter-function</artifactId>
+	<version>1.0.0-SNAPSHOT</version>
+	<name>twitter-function</name>
+	<description>twitter functions</description>
+
+	<parent>
+		<groupId>org.springframework.cloud.fn</groupId>
+		<artifactId>spring-functions-parent</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+		<relativePath>../../spring-functions-parent</relativePath>
+	</parent>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.cloud.fn</groupId>
+			<artifactId>twitter-common</artifactId>
+			<version>${project.version}</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-integration</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+			<exclusions>
+				<exclusion>
+					<groupId>org.junit.vintage</groupId>
+					<artifactId>junit-vintage-engine</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-configuration-processor</artifactId>
+			<scope>provided</scope>
+		</dependency>
+	</dependencies>
+
+</project>