Added Collate tool and condensed help test into one function

Claim your code guys!

.classpath

@@ -17,5 +17,6 @@
 	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="lib" path="libs/Collate-GUI.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>

libs/A0146130WreusedToTest.md

@@ -0,0 +1,17 @@
+# A0146130WreusedToTest
+###### /src/test/java/seedu/gtd/logic/LogicManagerTest.java
+``` java
+    @Test
+    public void execute_help() throws Exception {
+        assertCommandBehavior("help", HelpCommand.MESSAGE_USAGE+"/n"+HelpCommand.SHOWING_HELP_MESSAGE);
+        assertTrue(helpShown);
+        assertCommandBehavior("help add", AddCommand.MESSAGE_USAGE);
+        assertCommandBehavior("help select", SelectCommand.MESSAGE_USAGE);
+        assertCommandBehavior("help delete", DeleteCommand.MESSAGE_USAGE);
+        assertCommandBehavior("help clear", ClearCommand.MESSAGE_USAGE);
+        assertCommandBehavior("help find", FindCommand.MESSAGE_USAGE);
+        assertCommandBehavior("help list", ListCommand.MESSAGE_USAGE);
+        assertCommandBehavior("help exit", ExitCommand.MESSAGE_USAGE);
+    }
+
+```