Fixed issue where ActionbarAPI was needed to enable
Fixed issue where PlaceholderAPI/MVdWPlaceholderAPI didn't register placeholders for Skills
Added config option to denote data-saving interval
Added a failsafe for concurrency problems in data saving (If there is a large amount of data to save and you detect some lag, increase the data saving interval)
Added 2 new placeholders (energysymbol and status), which return the symbols from the actionbar