igmpproxy: Update to version 0.4

igmpproxy: Update to version 0.4

- Update from version 0.3 to 0.4
- Update of rootfile not required
- Changelog
    * Release version 0.4
	* Complement phyint whitelist with blacklist
		  Fixes: #54
		  Implement new phyint configuration option (blacklist), which enables
		  blocking of specific traffic.
	* Chroot and drop privileges after startup
		  With this PR:
		  - The apparent root directory can be changed after startup, thus denying
		    igmpproxy access to files and commands outside that environmental
		    directory tree.
		  - igmpproxy can drop root privileges after startup by changing id to
		    another user.
	* Add travis apt repositories for Ubuntu Precise

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>