Added extension descriptor (xml) file.
Added sample ruby script.
Merge branch 'master' of https://github.com/kaspersorensen/RubyDataCleanerExtension

Conflicts:
	RubyDataCleanerExtension/pom.xml
	RubyDataCleanerExtension/src/main/java/com/hi/datacleaner/ruby/RubyTransformer.java
	RubyDataCleanerExtension/src/main/java/com/hi/datacleaner/ruby/SimpleRubyTransformer.java
	RubyDataCleanerExtension/src/main/resources/com/hi/datacleaner/ruby/SimpleRubyTransformer.png
	RubyDataCleanerExtension/src/test/java/com/hi/datacleaner/ruby/SimpleRubyTransformerTest.java