Intermittent commit

M0 now runs reset.g and doesn't disable any drives any more (again)
M81 disables drives before ATX power is turned off
Bug fix: Aux G-codes are executed immediately when a print is in progress
Bug fix: FileStore::Seek didn't set internal bytesRead property
Bug fix: Disabled code queue for M105 for Pronterface
Other minor changes
Increased Z lift in homeall files from 2mm to 3mm
Adjusted center probe position in homeall and homez files
Rearranged SD-image directories to look equal to the ones in dc42's firmware fork