chore, find gperf tool via AC_PATH_PROG

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/dist'

* bld/dist:
  chore, find gperf tool via AC_PATH_PROG
bump, release v0.2.0 is imminent

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>