select an uart for modbus (closes #230)
updated profiles
Extract defines from pinning.c for meta generation
Usage: ifdef(`pin_XYZ', ....)
updated SD Reader library from
http://www.roland-riegel.de/sd-reader/
version 20120612
New configure options to control the SD reader module:
 - SDHC support
 - Read-only mode
 - Long file names

Option SD_NETIO_ADDON_WORKAROUND is no longer needed,
as the SPI module always sets the CS to high.
USTREAM, SER_RAM_23K256 and S1D15G10 use SPI too
power switching of SD card slot via pin SD_READER_POWERON
write protect signal is high active
card detect signal is low active
vfs_sd_open_in() only needed if SD_WRITE_SUPPORT == 1
fine-grained debug level
EMCD commands separately selectable
new commands "info" and "rm"
provide prototypes for ecmd functions
use sd version of vfs calls
option -SD_NETIO_ADDON_WORKAROUND has been removed so the help is obsolete
fix bug #92
Merge pull request #232 from eku/sdcard

MMC/SD Card Subsystem