Merge pull request #17 from alexander-zimmermann/master

Fix help / Fix clang warnings / Update todo
Merge pull request #18 from alexander-zimmermann/master

Doxygen comments for flowgrind.h, debug.[c|h], fg_time.[c|h]
Fix bug introduced by 974ee8a2c7. FreeBSD needs types.h
Merge pull request #21 from flowgrind/fix

Fix bug introduced by 974ee8a2c7. FreeBSD needs types.h
Because clock_gettime is found in librt, we need to link to that when
doing the check. A check with AC_CHECK_FUNCS fails.

Note: This will change with the glibc 2.17 release. The clock_* symbols
are being moved into libc and code will no longer need to link against
librt.
Merge remote-tracking branch 'upstream/master'