Example's filename ESPNBNST.ino is lowercase, and build fails.

### Basic Infos

The example file espnbnst.ino in the Examples folder causes this error when compiled:
Could not find file C:\Program Files\Arduino\libraries\ESP8266NetBIOS\examples\ESPNBNST\ESPNBNST.ino in C:\Program Files\Arduino\libraries\ESP8266NetBIOS\examples\ESPNBNST\

Fix:
I renamed the file using capital letters, and the example compiled.
