add gradle's build.gradle
 Changes to be committed:
	modified:   build.gradle
	new file:   src/main/java/wula/HttpServer.java
	new file:   src/main/java/wula/Main.java

add HttpServer part.
 Changes to be committed:
	new file:   .gitignore
 Changes to be committed:
	new file:   web/webapps/context/WEB-INF/applicationContext.xml
	new file:   web/webapps/context/WEB-INF/spring-servlet.xml
	new file:   web/webapps/context/WEB-INF/web.xml
	new file:   web/webapps/context/index.jsp

add web app part
 Changes to be committed:
	modified:   .gitignore
	modified:   build.gradle

update project config
 Changes to be committed:
	modified:   src/main/java/wula/Main.java

update main entry example