Merge tag '7.7.3' into develop

Upstream 7.7.3 release
Fixed line ending on .gitignore
Initial version for 7.8_pre20140105

Works in my test environment for amd64, and uses a ZIP generated from
Github for a specific commit from the 7.8 branch.
Added built 7.8_pre20140105 ebuild
Added systemd unit

Based on the draft from Caj Zell, I've added a systemd unit for LMS.
Additionally, logging is sent by default to syslog when started by
systemd because accessing the logs through the Journal and seeing the
recent log entries through 'systemctl status logitechmediaserver'.
Removed configuration of audiodir and playlistdir

These settings (through /etc/conf.d/logitechmediaserver) weren't working
in either the OpenRC or systemd cases and so I've removed them -- the
user is prompted to configure these through the web interface wizard in
any case.
Merge branch 'feature/7.8-git-snapshot' into develop
Merge branch 'release/7.8_pre20140105'