added grunt-cli to the npm install for developers to ensure that the `grunt` command will be available and usable.
added grunt-cli to the npm install for developers to ensure that the `grunt` command will be available and usable.

GerHobbelt/jasmine,GerHobbelt/jasmine,GerHobbelt/jasmine,GerHobbelt/jasmine,GerHobbelt/jasmine