Fixed typo in miscutils.h
Files for LED control, new class GPIO_Pin

LED class uses GPIO_Pin internally. GPIO_Pin will make configuring pin easy.

Note that the 'std=gnu++0x' was added, some header files are added to the
project and some dangling references to header files in src/ were removed
from the project.
Merge branch 'master' into LED-master
Merge branch 'LED-master'