Calling std::exit() in the middle of a C++ program subverts stack unwinding and can introduce subtle bugs.
travis: kernel check: change crashgrepping regex to match potentially more crashes.
htmlreport: fix syntax highlighting broken in ca4a0af840f45107ce33d902bd4d77d5af09aedf.
htmlreport: remove black background, make the report a bit more space efficient.
Merge pull request #331 from Dmitry-Me/DontExitInTheMiddle

Should not call std::exit() in the middle of program
Merge pull request #332 from matthiaskrgr/travis_kernel

travis: kernel check: change crashgrepping regex to match potentially more crashes.
Merge pull request #333 from matthiaskrgr/htmlreport_fix_colors

htmlreport: fix syntax highlighting broken in ca4a0af840f45107ce33d902bd4d77d5af09aedf
Reverted fix 6d0f490138c0e77cd563af5a8ca6ba17b720d526, but keeping the testcase in the testsuite.
Cleanup code - reorder checks and make variable declaration scope narrower.
Fix clang compiler warning in mathlib.cpp and repair test case for #5895
Library: handle validation expression '-1000-0'. Ticket #5847
Merge pull request #334 from Dmitry-Me/ReorderChecksAndCleanupDeclarations

Cleanup code - reorder checks and make variable declaration scope narrower
travis: replace kernel check with clang check.

Check clang instead of kernel, which is a lot faster.
Make clang check failure fatal to the build.
travis: run test_matchcompiler.py
travis: move CHECK_INTERNAL check up, remove "SRCDIR=build VERIFY=1" job in favor of "MAKEFLAGS="HAVE_RULES=yes" SRCDIR=build VERIFY=1"
travis: add -DCHECK_INTERNAL to the VERIFY=1 job to automatically fetch issues like #5869 via travis
travis: run cppcheck with --exception-handling where it matters, update clang repo hash.