[ADD & EDIT]

- add FastSocket framework
- add new class ‘AddIPPort’
- modify ‘port scanning’ layout in storyboard
- add port scan function into ‘portscan’ class
  - add ‘Add IP/Port’ & ‘Add common Port’ function
  - add ‘Delete’ function to delete selected IP/Port in tableview
  - add FastSocket connection function to scan IP/Port