Merge pull request #211 from wolfmanjm/upstreamedge

Upstreamedge
Update ReprapDiscountGLCD.cpp
move glcd framebuffer into USB RAM as there is not enough free ram otherwise
Merge pull request #212 from wolfmanjm/fix/glcd-frambuffer

Fix/glcd frambuffer
temporarily ifdef out the ethernet stuff
use ETH_RAM for the glcd frame buffer