Prefix function names with spring-

* Add `spring-` prefix to function names

Fixes: #9

This commit renames each sub-module in the common, consumer, function
and supplier groups with a prefix of `spring-`.

* Update README.adoc links to new prefixed names

spring-function-dependencies/build.gradle

@@ -0,0 +1,20 @@
+description = 'Spring Functions Catlog (Bill of Materials)'
+
+apply plugin: 'java-platform'
+apply from: "${rootDir}/publish-maven.gradle"
+
+dependencies {
+    constraints {
+        javaProjects.sort { "$it.name" }.each {
+            api it
+        }
+    }
+}
+
+publishing {
+    publications {
+        mavenJava(MavenPublication) {
+            from components.javaPlatform
+        }
+    }
+}