fixup payload offset calculation for fragmented packets
valgrind support
make Makefiles proof for spaces in $PATH
Merge pull request #209 from BytesGalore/fix_payload_offset

Fix payload offset
Merge pull request #97 from OlegHahm/makefile_windows_fixes

merged zkasmi/makefile_fixes to makefile_windows_fixes
Merge pull request #230 from LudwigOrtmann/issue_154

valgrind support for native