dist: pyterm control server (incl. support for multiple testbeds)
Merge pull request #1610 from phiros/feature_pytermcontroller

dist/pyterm: control server incl. support for multiple testbeds
iot-lab_M3: fix numof uart
Merge pull request #1686 from mehlis/iot-lab_M3-fix-numof-uart

iot-lab_M3: fix numof uart
lint: limit maximum length of input via scanf
test:cbor: supress warnings about nan/infty
Merge pull request #1687 from N8Fear/invalidscanf

lint: limit maximum length of input via scanf
Travis: enable apt caching

This should speed up the installation process a bit.
tests: run cppcheck for PR in Travis

Failures are ignored for now.
Merge pull request #1432 from LudwigOrtmann/cppcheck

tests: enable cppcheck for PR in travis
Merge pull request #1689 from LudwigOrtmann/issue-1636-p1

Travis: enable apt caching
Travis: merge install commands
Merge pull request #1691 from LudwigOrtmann/issue-1636-p2

Travis: merge install commands
Merge pull request #1688 from N8Fear/naninarith

lint: supress warnings about nan/infty in arithmetics in the CBOR unit tests
added spark core board