Rewrite of 'lxc' role

- 'lxc' role has been rewritten to support LXC 1.0 on Debian Wheezy;
- lxc 1.0 .deb packages will be automatically built if needed, they can
  be automatically shared with other hosts using local APT repository;
- 'lxc' role can manage LXC containers using simple YAML list;
Update 'bootstrap-ansible.sh' script

Changes in 'make deb' output, required additional packages.
Fix typo, add missing documentation
Fix non-usable apt-cacher-ng configuration
Make sure that rsyslog support is installed

rsyslog is not installed by default in some configurations (for example
Linux Containers).
Update 'ansible' role to work with new 'make deb'
Switch ownCloud upstream to https://

At the moment 'git' module does not handle git:// URLs without
fingerprint check, so let's witch back to https:// to avoid that.
Update git repositories from git:// to https://
Merge pull request #92 from drybjed/role/lxc

Rewritten LXC support, updates in various roles