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
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.
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.
Merge pull request #418 from frtos-wpan/uninterrupted-cleanup

Makefile.include (clean): ignore rm -f failing (e.g., on "core")
Saved six more bytes ;-)
Merge pull request #419 from oliverschmidt/master

Saved six more bytes ;-)
Merge pull request #407 from cmorty/submodule

Add submodule support for MSPSim and get Travis green again.
Document alternative toolchain for the CC2538DK