Fixed: same key value pair in detailActivity will be displayed as one record
Changed: interface optimized in MultiTemperatureChart
Added: setting exit with pressing back twice
Changed: set MainActivity as parent for SettingActivity
Added: new actions Weight, Height and Temperature
Changed:  version 4.0, delete Temperature
Added: statisticChart with average value of weight and height
Refactoring: rename AbstractDemoChart and MultipleTemperatureChart to AbstractChart and MultipleChart