First release with basic functions

• RESTful web service with following resources
  • is_synced - checks whether file with specified name already exists in destination folder
  • sync - receives uploaded multiparty stream and saves it to appropriate sub folder in destination folder
• tray icon with options:
  • change folder - opens the directory opening dialog, where the destination folder for assets must be selected
  • change port - opens dialog with port selection. Restarts server along with port configuration saving.
  • exit - stops application
• save settings into config.json located in app folder, which is a text file in JSON format
• logging:
  • special folder for all log files
  • log files rolling (gzip old files)
• package into single jar with dependencies