Add plain Jenkins support (#22)

This is for issue #22.
I added setup and start scrips, git ignore files and config.xml.
hudson.model.UpdateCenter.xml so it will point to the stable version 
This is the default configuration, the file gets created if it doesn't exist when we run the test(save_config.py), since this it's not under gitignore as it will hold the future configuration, I want to add it as part of this commit so it won't confuse other collaborators that will ran the tests and then will make a commit.