Now, almost all (with the exception of the dev_io.c which
will be fixed soon) specific code to a board is
located inside include/board/<board_name> and
src/board/<board_name>

This is a first setp into modularizing the source code into
independent components. We would like to move as much as
possible functionality into independent libraries (src/libs).

For invalid temporary channels, such as TBT position and FOFB
position, the start address was not aligned to 8 or 16 bit, causing
a segmentation fault on reading from these address.

This fixes #80 github issue.