Shorten descriptions for buttons

Author: TimothyNguyen

src/main/java/org/usfirst/frc/team69/util/oi/ButtonData.java

@@ -23,9 +23,9 @@ public class ButtonData {
      *
      */
     public enum Action {
-        WHEN_PRESSED("RELEASED"),
-        WHEN_RELEASED("PRESSED"),
-        WHILE_HELD("HELD");
+        WHEN_PRESSED("R"),
+        WHEN_RELEASED("P"),
+        WHILE_HELD("H");
 
         private final String m_desc;