Import Sofia bootloader (Arduino Tian)

bootloaders/sofia/Bootloader_D21_Sofia_V2.1/.DS_Store

...rs/sofia/Bootloader_D21_Sofia_V2.1/Bootloader_Sofia.atsln

...rs/sofia/Bootloader_D21_Sofia_V2.1/Bootloader_Sofia.atsuo

...rs/sofia/Bootloader_D21_Sofia_V2.1/Bootloader_Sofia.cproj

...ers/sofia/Bootloader_D21_Sofia_V2.1/atmel_devices_cdc.cat

...ers/sofia/Bootloader_D21_Sofia_V2.1/atmel_devices_cdc.inf

bootloaders/sofia/Bootloader_D21_Sofia_V2.1/src/.DS_Store

...a/Bootloader_D21_Sofia_V2.1/src/ASF/common/boards/board.h

...fia_V2.1/src/ASF/common/services/sleepmgr/samd/sleepmgr.c

...fia_V2.1/src/ASF/common/services/sleepmgr/samd/sleepmgr.h

...21_Sofia_V2.1/src/ASF/common/services/sleepmgr/sleepmgr.h

....1/src/ASF/common/services/usb/class/cdc/device/udi_cdc.c

....1/src/ASF/common/services/usb/class/cdc/device/udi_cdc.h

...c/ASF/common/services/usb/class/cdc/device/udi_cdc_conf.h

...c/ASF/common/services/usb/class/cdc/device/udi_cdc_desc.c

.../src/ASF/common/services/usb/class/cdc/usb_protocol_cdc.h

...ader_D21_Sofia_V2.1/src/ASF/common/services/usb/udc/udc.c

...ader_D21_Sofia_V2.1/src/ASF/common/services/usb/udc/udc.h

...D21_Sofia_V2.1/src/ASF/common/services/usb/udc/udc_desc.h

...ader_D21_Sofia_V2.1/src/ASF/common/services/usb/udc/udd.h