Remove a deprecated grunt task and add an active one. Change 'sever' to 'module' as grunt-contrib-watch is not a server

grunt-reload is completely outdated and should be removed. 
the middleware can be used with a LiveReload module, not necessarily a server
Merge pull request #44 from stevemao/patch-1

Remove a deprecated grunt task and add an active one. Change 'sever' to 'module' as grunt-contrib-watch is not a server