Merge pull request #40 from couchbaselabs/feature/issue_930_deadlock_forestdb

Changed this log message type from ERROR to INFO because of unnecessary.

Author: pasin

src/main/java/com/couchbase/lite/store/ForestDBStore.java

@@ -731,7 +731,7 @@ public RevisionList changesSince(long lastSequence,
                 Document doc;
 
                 while ((doc = itr.nextDocument()) != null) {
-                    Log.e(TAG, "[changesSince()] docID=%s seq=%d conflicted=%s", doc.getDocID(), doc.getSelectedSequence(), doc.conflicted());
+                    Log.d(TAG, "[changesSince()] docID=%s seq=%d conflicted=%s", doc.getDocID(), doc.getSelectedSequence(), doc.conflicted());
                     List<String> revIDs;
                     if (options.isIncludeConflicts()) {
                         revIDs = ForestBridge.getCurrentRevisionIDs(doc, true);