API Browser version 1.0.15, API client class version 1.1.4
- API client class: added methods/functions upgrade_device(), upgrade_device_external(), spectrum_scan() and spectrum_scan_state()
- API browser tool: embedded the favicon in base64 encoded format
- API browser tool: added a dynamic "back to top" butoon
- examples: added examples ap_scanning_state.php and auth_guest_basic.php