define LEDs for c1
make this a module
document the module
Should be in separate feature branch

This reverts commit e241b81f217be328171bac4bb687971d019e92e1.
This reverts commit be5d0aa37094df887d7e579d17f8f3a43c5b891b.
This reverts commit 965572327a08c39777ebc9599429b20702213861.
Merge remote-tracking branch 'upstream/master'
enable the card by default
Merge pull request #26 from rambo/revc1sdcard

Revc1sdcard (errata)