add Ruby Eclipse settings

ruby/.buildpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<buildpath>
+	<buildpathentry kind="src" path=""/>
+	<buildpathentry kind="con" path="org.eclipse.dltk.launching.INTERPRETER_CONTAINER"/>
+</buildpath>

ruby/.loadpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<loadpath>
+    <pathentry path="" type="src" />
+    <pathentry path="org.rubypeople.rdt.launching.RUBY_CONTAINER" type="con" />
+</loadpath>

ruby/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>GildedRose.rb</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.rubypeople.rdt.core.rubybuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.dltk.core.scriptbuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.rubypeople.rdt.core.rubynature</nature>
+		<nature>org.eclipse.dltk.ruby.core.nature</nature>
+	</natures>
+</projectDescription>