Updated the CC2538 bsp with aesthetic fixes and support for toggling the bootloader backdoor with the user button.
Aesthetic fixes to the UART module.
Added I2C initialization in the board_init() function.
FW-287. Fix
Cleaning stuff.
FW-287. Fixing simulation environment bug.
Merge pull request #113 from OpenMote/develop

OpenMote-CC2538 update
Merge pull request #114 from NicolaAccettura/develop_FW-287

FW-287. Fix.
Merge branch 'develop' of https://github.com/openwsn-berkeley/openwsn-fw into develop
Merge branch 'develop' of https://github.com/NicolaAccettura/openwsn-fw into develop
Merge branch 'develop' of https://github.com/openwsn-berkeley/openwsn-fw into develop