Added MTAppJSONTable
Removed "jsonSave.order" and "jsonSave.header"

The "order" and "header" options are not saved in the value.
orderとheaderはjsonに保存しないようにする。
Code golf
Edited an alert message
Use try-catch to parse JSON
Changed an option name from "oder" to "headerOrder"
Changed the "add" option from String to Boolean and added the "headerPosition" option
Added code of the "headerPosition" option which is set "left".
Removed console.log
Removed code of checking the "add" option.
Changed the function of "add" option.
Changed a classname of buttons.
Added the delete button
Added checkboxes for deleting data.
Classname of checkboxes is renamed.
Remove code for developing
Added code of checkboxes
Save nothing when table is empty
Added styles of "jsontable-clear-"
Merge branch 'MTAppJSONTable' into develop