Provide an alternative to clock_gettime for Mac OS X
Not having clock_gettime() is not fatal anymore.
Remove a redundant test.
Avoid opening .h2devs multiple times

h2devInit() generates several calls to h2devGetKey(). This
function used to open .h2dev everytime, even if the caller
isn't interested in the file descriptor.

Replace those open by a check with access(2).

This way the code doesn't trigger an NFSv4 bug on Linux.
Constify 'name' argument of taskSpawn2().
Remove generated file
Release pocolibs 2.13
Bump version for future developments