Add javadocs to getters

Make setters package-private
	Small noop tweak to the computeAverages

core/java/src/net/i2p/stat/Rate.java

@@ -434,7 +434,7 @@ public class Rate {
         out.setTotalEventCount(total);
         
         if (total <= 0) {
-            final double avg = useLifetime ? getAvgOrLifetimeAvg() : getAverageValue();
+            final double avg = useLifetime ? getLifetimeAverageValue() : getAverageValue();
             out.setAverage(avg);
         } else {
 

core/java/src/net/i2p/stat/RateAverages.java

@@ -4,6 +4,7 @@ package net.i2p.stat;
  * Storage space for computations of various averages.
  * 
  * @author zab
+ * @since 0.9.4
  */
 public class RateAverages {
     
@@ -16,6 +17,7 @@ public class RateAverages {
     };
     
     /**
+     * @since 0.9.4
      * @return thread-local temp instance.
      */
     public static RateAverages getTemp() {
@@ -33,43 +35,67 @@ public class RateAverages {
         totalValues = 0;
     }
 
+    /**
+     * @since 0.9.4
+     * @return one of several things:
+     * if there are any events (current or last) => weighted average
+     * otherwise if the useLifetime parameter to Rate.computeAverages was:
+     * true => the lifetime average value
+     * false => the current average value
+     */
     public double getAverage() {
         return average;
     }
 
-    public void setAverage(double average) {
+    void setAverage(double average) {
         this.average = average;
     }
 
+    /**
+     * @since 0.9.4
+     * @return the current average == current value / current event count
+     */
     public double getCurrent() {
         return current;
     }
 
-    public void setCurrent(double current) {
+    void setCurrent(double current) {
         this.current = current;
     }
 
+    /**
+     * @since 0.9.4
+     * @return the last average == last value / last event count
+     */
     public double getLast() {
         return last;
     }
 
-    public void setLast(double last) {
+    void setLast(double last) {
         this.last = last;
     }
     
+    /**
+     * @since 0.9.4
+     * @return the total event count == current + last event counts
+     */
     public long getTotalEventCount() {
         return totalEventCount;
     }
     
-    public void setTotalEventCount(long totalEventCount) {
+    void setTotalEventCount(long totalEventCount) {
         this.totalEventCount = totalEventCount;
     }
     
+    /**
+     * @since 0.9.4
+     * @return the total values == current + last values
+     */
     public double getTotalValues() {
         return totalValues;
     }
     
-    public void setTotalValues(double totalValues) {
+    void setTotalValues(double totalValues) {
         this.totalValues = totalValues;
     }