Bumped the version number from Contiki 2.6 to Contiki 2.7
Merge pull request #402 from adamdunkels/release-2-7

Bumped the version number from Contiki 2.6 to Contiki 2.7
Added mspgcc 4.7.x flags to the Wismote makefile
Fix UDP statistics.
feat(code-style): Add a script to automatically format all changed files

If executed inside the repository it will run the default Contiki
uncrustify script on all changed .c and .h file. This could be added
as a Git pre-commit hook. See http://git-scm.com/book/en/Customizing-Git-Git-Hooks
Better error message in case of wrong CPUREV value
fixed a C error "della madonna"

http://it.wikipedia.org/wiki/Jerry_Cal%C3%A0
Removed duplicate code in rpl-icmp6
Allow setting random seed as parameter
Make regressiontest reproducable
Clean up setting channel and CCA-threshold for CC2420 based motes.
The CCA-threshold now defaults to -46 which give better simulation
results and typically also better experimental results.
This adjustment is also needed due to commit 0a13f99 in mspsim. As
promised in https://github.com/mspsim/mspsim/pull/18 it broke the
regression tests.
Added mspsim as a submodule instead of as a binary mspsim.jar file
Added 6502 driver for WIZnet W5100 in MACRAW mode.
Tolerate loosing one packet in  01-sky-shell-collect.csc
Remove broken test from regression testing
Move simulation execution from Makefile to Bash script; show Progress
Additional code is needed to show the progress. Otherwise Travis is
likely to become unhappy and terminates the job. This was no fun within
the Makefile. Moving the execution to a Bash script allows better
maintainability.
In case of an error the error all logs will be printed when using a CI.
Added missing fixup & removed wait loop from poll.
Makefile.include (clean): ignore rm -f failing (e.g., on "core")

rm -f can still fail, e.g., if trying to delete a directory.

If there was, say, a directory called "core", a "make clean" would
therefore only try to delete the files listed in the first command but
not proceed with the rest of the cleanup.

"make clean" itself failing may also affect any outside build process
that invokes it.
Saved six more bytes ;-)
Document alternative toolchain for the CC2538DK