Updated behaviours of add/edit commands, added a search command.

* New behaviour of add/edit:
    NEW: storm add name host@server:port
    OLD: storm add name host server --port

    NEW: storm edit name host@server:port
    OLD: storm edit name host server --port

* Added a search command for searching host entries
    $ storm search vps
    Listing results for vps:
      vps -> root@emreyilmaz.me:22