Added possibility for .conf-File
 - Script searches for "/etc/f3lnet.conf" and sources it.
 - if "$WIFIDEV" is set, f3lnet.sh will use that device
 - else "wlan0" is used

Possible Enhancement:
 - I don't like sourcing the .conf file. Any other ideas?
Default-Value for "WIFIDEV" is set smarter now.
Small cosmetic changes:
 - added hint to 'refresh' if hostlist not downloaded.
 - Fixed grammatical mistake ("this hosts", seriously?)
Added setting "WIFIDEV" to install.html.
 Merge branch 'dev_conffile' into 'master'

Dev Conffile

 Added possibility for .conf-File
     - Script searches for "/etc/f3lnet.conf" and sources it.
     - if "$WIFIDEV" is set, f3lnet.sh will use that device
     - else "wlan0" is used

 Possible Enhancement:
     - I don't like sourcing the .conf file. Any other ideas?