Allow users to specify only a 'src' option and have it overwrite the file.

[shakyShane]

I actually submitted a pull-request to Grunt to allow this functionality out of the box - not accepted unfortunately. :(

Anyway, this PR will allow for users to only specify a SRC option and then it will overwrite each file that is matched.

removelogging: {
      dist: {
        src: ["app/js/test/*.js"] /* all matching files will be overwritten */
      }
}

[jasonmcaffee]

+1. the library isn't really useful without it.

[Hesesses]

This is must!