new i2c sensor (tmp175) added

Signed-off-by: Patrick Hieber <p@trickhieber.de>
Change license to GPLv3 in order to be ethersex compliant.

Signed-off-by: Patrick Hieber <p@trickhieber.de>
license fix
tmp175 in menuconfig
Merge branch 'master' of github.com:phieber/ethersex
increase the timeout to 5 minutes

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
change bootload_delay to uint16_t

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
fix formatting

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
update checksum when saving a new value

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
fix formatting

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
add master boot record support

When booting, the bootloader should only wait for
a new image when either no image has been flashed yet or
the user explicitly wishes to update the image. Another reason
would be when a previous flash failed (image corruped, image doesn't
reach the main loop).

Apart from that, the bootloader should immidiately start the application.

The user can now invoke the extended delay by the already established
ECMD command "bootloader".

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
added longer identifier to struct

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
fixed wrong format (%s) of mbr.identifier

mbr.identifier is not always \0-terminated and therefore
needs to be printed char by char

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
fixed indentation

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
leave the last four bytes untouched for flash count

Signed-off-by: Maximilian Güntner <maximilian.guentner@gmail.com>
Memory leak fixed.
Memory leak fixed.
Memory leak fixed.
Wrong number of scanf parameters fixed.
Resource leak fixed.