* Add check for MISRA-C 2012 Rule 2.7 and test cases.
* Cast unused function parameters of some test patterns to "void".
* Fix function parameter void cast in "misra_17_6". Add comment to "misra_11_7_extra" to make all function parameter void casts look alike.
Rule 21.1 now doesn't report errors on usage of library functions
started from underscore (e.g. `_exit') and valid errno assignment.
See added tests for examples.
Fix R16.3 state machine which doesn't report errors in last case/default
statemenet. See added tests for examples.
Issue on trac: https://trac.cppcheck.net/ticket/8548
* Update addons structure. Make Y2038 addon works.
All addons are now located in same directory, where cppcheck-gui is
looking for them.
Y2038 addon has been updated to latest cppcheck version. Output is same
as 303622f01c commit as it described in
README: 303622f01c/addons/y2038/README.
* Clean up .travis.yml
* Update travis.yml paths.
* misra.py: Bring back -P argument for backward compatibility
* Fix paths
* Normalize dumpfile paths tpo cppcheck format
* Fixup 3 test.
* Add arguments regression test.
* Fixing travis build