BUGFIX: Memory leak on shutdown fixed

The announce list will now also be deleted, if the threshold is < 0
BUGFIX: Memory leak on parsing incoming dtn messages fixed

If neighbor information wasn't returned, the struct hasn't been freed.
Now it is fixed and acts like the group parsing section above.
BUGFIX: Changed autogen.sh to not override files under version control

The autogen.sh script has executed the autoreconfigure with
--force, which causes a overwrite of already generated files. This is
now fixed.
fixed spelling
dtndht (0.2.3) released

* Memory Leaks fixed
  * If empty neighbor information were parsed, the allocated space is now freed
  * On shutdown, the announcement list will be freed correctly
* Improved README
Add debian files to generated dist archive.
Lower debhelper requirement in debian/control.
Remove strange double call of mkversion.sh.
Add missing space in changelog.
autogen script changed

Set -e added.
Regex for changelog version modified.
Made mkversion.sh executable.
Merge remote-tracking branch 'origin/master'

Conflicts:
	autogen.sh