Changeset : eye-fi support from buttim and others in ...

eye-fi support from buttim and others in ​http://chdk.setepontos.com/index.php?topic=650.msg106049#msg106049
In particular it should be possible to

• list the available networks and configuring any of them into the card by giving the appropriate password
  
• list the configured networks and delete any of then
  
• force the wlan on the card on or off
  

Eyefi functionalities have been put in a loadable library (eyefi.flt).
Heavily based on the reverse engineereing done by Dave Hansen (​http://sr71.net/~dave/projects/eyefi/)