enable bug fixed, select functionality added

bug fix: action 'enable', 'enableAll', 'disable', 'disableAll'
add functionality: action 'select', 'selectAll', 'deSelect', 'deSelectAll'
Merge pull request #6 from zhiyiting/patch-1

bug fix: action 'enable', 'enableAll', 'disable', 'disableAll'
add functionality: action 'select', 'selectAll', 'deSelect', 'deSelectAll'