Implement store search result

1. Refactor NetworkConnector, Ticket, TicketList to support store as well.
   - NetworkConnect is now just only fetching json text from server.
   - TicketList connect to server using Network connector and  parse the json array text, finally create each new Ticket class and add it to arraylist.
   - TicketFragment is only keeping mAdapter for its data store and asking it to update the data from server without asking TicketList or NetworkConnector.
   - TicketAdapter owns TicketList as private members.
2. Create or Modify Store, StoreList, StoreAdapter, StoreFragment, StoreActivity class
3. Implement store searching with store name. (it doesn't work with bug and need to update sooner)