Save users asynchronously

src/main/java/com/gmail/nossr50/commands/experience/AddlevelsCommand.java

@@ -27,7 +27,7 @@ public class AddlevelsCommand extends ExperienceCommand {
         profile.addLevels(skill, value);
 
         if (player == null) {
-            profile.save();
+            profile.scheduleAsyncSave();
             return;
         }
 

src/main/java/com/gmail/nossr50/commands/experience/AddxpCommand.java

@@ -28,7 +28,7 @@ public class AddxpCommand extends ExperienceCommand {
         }
         else {
             profile.addXp(skill, value);
-            profile.save();
+            profile.scheduleAsyncSave();
         }
     }
 

src/main/java/com/gmail/nossr50/commands/experience/MmoeditCommand.java

@@ -29,7 +29,7 @@ public class MmoeditCommand extends ExperienceCommand {
         profile.modifySkill(skill, value);
 
         if (player == null) {
-            profile.save();
+            profile.scheduleAsyncSave();
             return;
         }
 

src/main/java/com/gmail/nossr50/commands/experience/SkillresetCommand.java

@@ -110,7 +110,7 @@ public class SkillresetCommand implements TabExecutor {
         profile.modifySkill(skill, 0);
 
         if (player == null) {
-            profile.save();
+            profile.scheduleAsyncSave();
             return;
         }