change low mem error to warn

core/java/src/net/i2p/util/ByteCache.java

@@ -102,7 +102,7 @@ public final class ByteCache {
     public static void clearAll() {
         for (ByteCache bc : _caches.values())
             bc.clear();
-        I2PAppContext.getGlobalContext().logManager().getLog(ByteCache.class).error("WARNING: Low memory, clearing byte caches");
+        I2PAppContext.getGlobalContext().logManager().getLog(ByteCache.class).warn("WARNING: Low memory, clearing byte caches");
     }
 
     private Log _log;

router/java/src/net/i2p/router/RouterVersion.java

@@ -18,7 +18,7 @@ public class RouterVersion {
     /** deprecated */
     public final static String ID = "Monotone";
     public final static String VERSION = CoreVersion.VERSION;
-    public final static long BUILD = 18;
+    public final static long BUILD = 19;
 
     /** for example "-test" */
     public final static String EXTRA = "-rc";