1.update the FutureCallbakk with generic type;
2.modified the LaunchBuilder methods name;
3.add comments for the RocketRequestBuilder;
1.added http post supporting;
2.added http headers supporting;
1.refactor the http request method;
1.removed the unused codes;
1.rename rocketrequestbuilder file to JsonRequestBuilder
2.remove one method in the LaunchBuilder file
1.added the image request builder;
1. added the image handle.
1.add image request handling.
1.image request handling;
1.Added the image cache supporting before 3.0(The OOM issue).
1.optimize the image load;
1.added image load handling;
removed the unused methods;
1.image cache;
add comments；
1.add https support;
1.add https supporting;
1.add comments;
Create README.md
change file folder;