adding webjars code to spring-boot (#648)

merging the code and webjars different project cleanup

spring-boot/src/main/java/com/baeldung/WebjarsdemoApplication.java

@@ -0,0 +1,12 @@
+package com.baeldung;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class WebjarsdemoApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(WebjarsdemoApplication.class, args);
+	}
+}