Refactored

- Changed project package definition from "com.napontaratan.wifinder" to
"com.napontaratan.wifi".
- Moved source code to "com.napontaratan.wifi".
- Changed package name "ui" to "(com.napontaratan.wifi.)view".
- Renamed "WiFiPoint" to "WifiMarker".
- Renamed "WiFinderServerConnection" to "ServerConnection".
- Deleted LatLon.java.