Compress Postgres backup file

Backup postgres to .sql without needing restart of service & Increase cipher suite level

Merge pull request #254

This change set builds collectd from source and configures it in one of
the following ways:

- If Librato credentials are present, collectd will be configured to
send data points to Librato using the collectd-librato plugin.

- If no Librato credentials are present, collectd will be configured to
write RRD files locally (/opt/collectd/var/lib/collectd/rrd by default).

Merge pull request #252

My selfoss logs were using 10GB of space because they weren't being rotated properly.

Use available gitolite3 package on Ubuntu trusty

apache sites: Wrong ownership and filename

Merge pull request #244

Merge pull request #234

Merge pull request #245

/etc/apache2/sites-available and old (dangling) symlinks in
/etc/apaches/sites-enabled.
Also, remove unnecessary apache2 restart after creating a new
virtualhost but not yet enabling it.

Add note about editing hosts file to README

* Postfix: Trusty comes with postgresql 9.3, not 9.1
* owncloud 6.0.1 is part of the distribution, doesn't require opensuse repository
* owncloud requires libapache2-mod-php5
* uses prosody repository that matches the ansible_distribution_release (trusty, wheezy, etc)

The virtual site files must be owned by root (serious security issue)
and they must have the .conf filename suffix for a2ensite on
Ubuntu 14.04LTS (apache 2.4.7).

I guess the .conf appendix is a change introduced in apache 2.4.
This change should make it backward compatible with apache 2.2.

On Ubuntu 14.04 LTS, a2ensite automatically appends ".conf" to the filename it looks for in /etc/apache2/sites-available/
Therefore, the file "/etc/apache2/sites-available/roundcube" must be renamed to
"/etc/apache2/sites-available/roundcube.conf".

Security issue:
This file must be owned by root, otherwise it is a huge security issue (User www-data could modify the file and get root at next restart of apache).

Merge pull request #227

Conflicts:
	README.textile
	site.yml
	vars/defaults.yml

Merge pull request #239

Merge pull request #238

+ make lines < 80 chars

Removed unused status checks on UFW

Remove ahbl as it's being winded down

http://ahbl.org/content/changes-ahbl

Fixes #232

cgit dependency missing