SAMR21 BSP Support Added
Build Failures are Fixed for SAMR21.
FW-275. Dummy std_uart0 project for TelosB.
FW-275. Fix.
Merge pull request #99 from mathivanane/develop

FW-233. Atmel SAM R21 Xplained Pro BSP port.
Merge branch 'develop' into develop_SW-42