class portion from UdfTools, fix new_disambiguation error

	new file:   disambiguation-author/src/main/java/pl/edu/icm/coansys/disambiguation/author/pig/GenUUID.java
	new file:   disambiguation-author/src/main/java/pl/edu/icm/coansys/disambiguation/author/pig/GetContributors.java
	deleted:    disambiguation-author/src/main/java/pl/edu/icm/coansys/disambiguation/author/pig/UdfTools.java
	modified:   disambiguation-author/src/main/pig/new_disambiguation.pig