Add Galileo to the platforms supported in w5100.h
Minimum changes required by WiFi lib to support Galileo
Minimum changes required by SD lib to support Galileo
Merge pull request #2 from zfields/galileo_sd

Minimum changes required by SD lib to support Galileo
Merge pull request #3 from zfields/galileo_ethernet

Add Galileo to the platforms supported in w5100.h
Merge pull request #4 from zfields/galileo_wifi

Minimum changes required by WiFi lib to support Galileo
Clear compiler warnings inherited from Arduino code use.