Add cookbook item on creating custom content blocks
mod_admin: new-rsc dialog callback; optionally accept other rsc properties than the standard ones.
This makes it possible to add category specific rsc creation templates to the new-rsc dialog.
doc: Document how to set m_config values in the site's config
mod_ssl: Fix for generating absulute urls when there is no request data
Merge pull request #669 from cillianderoiste/master

Add cookbook item on creating custom content blocks
docs: mod_ssl, add explanation how to generate the .csr file for certificate authorities.
core: periodic process to unlink deleted medium files (and their generated previews)
mod_admin: show i18n 'widget_content_nolang_before' block also in std widget. Fixes #671
mod_oembed: view embedded content using https:// iff the content is view using a secure connection.
Fixes #673
core: flatten escaped js to a binary.
mod_admin(_frontend): set delegate for sorting edges, so that edges can be sorted in dynamically loaded content using the admin_frontend.
core: allow task to be scheduled by date/time instead of only seconds.
core: if the connection is on SSL, then generate https absolute urls.
mod_admin/mod_oath: init args might contain protocol option if mod_ssl is enabled
core: merge Mawuli's work for GSoC 2013.

Project title: "Zotonic Modules Repository Integration".

This work has resulted in a reengineered module command for the CLI: `zotonic modules`,
as well as a new ZMR admin client module: mod_zmm (not installed by default).

Fixes #672.

Notable comments from the merged commits:

Rename zotonic-installmodule to zotonic-modules.
Add more subcommands.
Add Mercurial remote url extractor:

  Given a local path to a Mercurial repository, return the `default` remote
  repository url.

  Fallback on another remote repository in the abscence of a `default`

Install directly from googlecode.
Add test fixtures.
docs: document extra arguments of confirm action.
core: Fix stats collecting and access logging
mod_mailinglist: Fix button order of delete confirmation dialog.
mod_base: Demonitor the page session before responding. Prevents 400 responses when the page session stops and the request process is still alive.
mod_mqtt: fix for data decoding in pubzub. More unique unique_id.