Ads java sdk - builder pattern


The Ads Java SDK is coming along.

I added a builder pattern :

Campaign campaign = Campaign.builder()
			    .name("Test Campaign Builder)")
	assertTrue("campaign builder style now has an id generated", campaign.toString().contains("id"));
	assertTrue("campaign builder style has been deleted", campaign.isDeleted());

I am going to try to get test coverage above 90% before release, and make available via Maven Central
(Maven, Gradle, Ivy, etc)
I may add some targeting criteria utilities as well.