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.
Merge branch 'master' into engine.io
core: more work on engine.io
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.
mod_mqtt: fix for encoding objects
mod_mqtt: fixes for local mappings of topics received via postbacks.
core: added debug message for continuations of unknown sessions.
Merge branch 'master' of git://github.com/zotonic/zotonic into engine.io