Version details: 0.1.6

the Hurd/Mach backend (and probably the kqueue backend as well) fails to build:

if gcc -DHAVE_CONFIG_H -I. -I. -I..  -I.. -I../libgamin -I../protocol -I../lib
-I../libgamin -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include  
-DBINDIR=\""/usr/libexec"\" -DG_DISABLE_DEPRECATED -DGAM_DEBUG_ENABLED    -Wall
-Wchar-subscripts -Wmissing-declarations -Wmissing-prototypes -Wnested-externs
-Wsign-compare -Wno-sign-compare -g  -MT gam_hurd_mach_notify.o -MD -MP -MF
".deps/gam_hurd_mach_notify.Tpo" -c -o gam_hurd_mach_notify.o
gam_hurd_mach_notify.c; \
then mv -f ".deps/gam_hurd_mach_notify.Tpo" ".deps/gam_hurd_mach_notify.Po";
else rm -f ".deps/gam_hurd_mach_notify.Tpo"; exit 1; fi
gam_hurd_mach_notify.c:45:22: error: gam_poll.h: No such file or directory
gam_hurd_mach_notify.c: In function 'server':
gam_hurd_mach_notify.c:474: warning: nested extern declaration of 'fs_notify_server'
gam_hurd_mach_notify.c:477: warning: no previous prototype for 's'
gam_hurd_mach_notify.c: In function 'gam_hurd_notify_init':
gam_hurd_mach_notify.c:693: warning: implicit declaration of function
'gam_poll_set_kernel_handler'
gam_hurd_mach_notify.c:693: warning: nested extern declaration of
'gam_poll_set_kernel_handler'
gam_hurd_mach_notify.c:694: error: 'gam_backend_add_subscription' undeclared
(first use in this function)
gam_hurd_mach_notify.c:694: error: (Each undeclared identifier is reported only once
gam_hurd_mach_notify.c:694: error: for each function it appears in.)
gam_hurd_mach_notify.c:695: error: 'gam_backend_remove_subscription' undeclared
(first use in this function)
gam_hurd_mach_notify.c:696: error: 'gam_backend_remove_all_for' undeclared
(first use in this function)
make[3]: *** [gam_hurd_mach_notify.o] Error 1