drivers/xbee: encryption support

add encryption to drivers

fix new line at the end of file

add shell command for enable encryption and set encryption key on a given device

modify _net_if_set_encrypt_key to support any key length

modify _net_if_set_encrypt_key to support any key length of the key

modify blank line

fix ace before tab in indent

fix ace before tab indent

fix ace before tab indent an error

fix trailing white space

drivers/xbee: encryption support

add encryption to drivers

fix new line at the end of file

add shell command for enable encryption and set encryption key on a given device

modify _net_if_set_encrypt_key to support any key length

modify _net_if_set_encrypt_key to support any key length of the key

modify blank line

fix ace before tab in indent

fix ace before tab indent

fix ace before tab indent an error

fix trailing white space

modify drivers/xbee/xbee.c

fix white spaces on xbee.c

Update xbee encryption driver

white line at end xbee.h

fix error

fix sc_netif.c

fix rebase master interactive

drivers/xbee: encryption support

add encryption to drivers

fix new line at the end of file

add shell command for enable encryption and set encryption key on a given device

modify _net_if_set_encrypt_key to support any key length

modify _net_if_set_encrypt_key to support any key length of the key

modify blank line

fix ace before tab in indent

fix ace before tab indent

fix ace before tab indent an error

fix trailing white space

drivers/xbee: encryption support

add encryption to drivers

fix new line at the end of file

add shell command for enable encryption and set encryption key on a given device

modify _net_if_set_encrypt_key to support any key length

modify _net_if_set_encrypt_key to support any key length of the key

modify blank line

fix ace before tab in indent

fix ace before tab indent

fix ace before tab indent an error

fix trailing white space

modify drivers/xbee/xbee.c

fix white spaces on xbee.c

Update xbee encryption driver

white line at end xbee.h

fix error

fix rebase  conflict 4

fix same missing in patches changes

fix ascii to hex index parser

fix syntax rules

fix syntax issue 2

add _netopt_strmap NETOPT_ENCRYPTION e NETOPT_ENCRYPTION_KEY

fix trailng white spaces