Check limit's ctype in GET request, fixes #4710.
Check if reference exists, fixes #5328
Changes in notes component. Fixes #4371.

Squashed commit of the following:

commit 53ff0172f6535ed0df38d77aced583de17b5bb9d
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Fri Jul 12 19:28:50 2013 +0200

    Cosmetic changes

commit 6b22bb01addf0c76aa50eb502ccccad8966f4257
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Fri Jul 12 18:14:59 2013 +0200

    Cosmetic changes

commit 0641c872b6208a84426f1e569fc0ba25a6cadc8a
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Fri Jul 12 18:07:02 2013 +0200

    Fix condition.

    Allow edit notes created in the current source language
    and translate notes created in the source culture of the resource

commit fcd99eaa366a8bebe559b7cf7d5d19db7f0ed3ec
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Fri Jul 12 02:27:30 2013 +0200

    Ignore notes without the current i18n tuple

commit a56f9331ccb07f40beb2e4c780561b9ef17297ad
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Thu Jul 11 23:04:47 2013 +0200

    Use resource sourceCulture in new notes
Show generic rep. in search results, fixes #4919

Squashed commit of the following:

commit 6d414294f79ba9aaf5de37d174013e3c68b78061
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Sat Jul 13 04:58:15 2013 +0200

    Show generic representation in search index.

    Show generic representation for digital objects
    without thumbnail

commit b2cc6b349ee66f9aca6525b0426a616538bbeb74
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Sat Jul 13 04:55:49 2013 +0200

    Add field in QubitSearchInformationObject.

    Add unindexed mime_type field
Fixed call on non-object, refs #5353
Issue warning on invalid description status

Was causing a MySQL foreign key constraint error which halted import.
Merge local changes with 1.x
Use display date in DC export, fixes #4302
Don't populate start date in DC import, refs #4302
Don't take permissions without object, fixes #5413
Allow ISO 8601 format for event dates, fixes #5338
ACL changes, fixes #4333.

Deny access to descriptions without repository
if the permission has repository condition.
Change start/end date tooltip, fixes #5338
Change general note attribute, fixes #4463
Changes in settings global form, fixes #5179.

Create a form widget to show the upload space available,
move this field inside the global form, etc.
ACL changes for taxonomies, fixes #3879

Squashed commit of the following:

commit ce8eca8c4a3c5649ea8561b9e5b89c5e14c9af63
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Wed Jul 31 05:40:24 2013 +0200

    Allow multiple taxonimies conditions

    Change getFilterCriterion to allow more than one taxonomy's
    condition per user/group

commit 90c2dddf05e491f45737c8f0cc87fad73192b4b4
Author: José Raddaoui Marín <raddaouimarin@gmail.com>
Date:   Wed Jul 24 00:59:37 2013 +0200

    Check taxonomy constants in QubitAcl
Cosmetic changes
Add pagers in actor's context menu, fixes #5370
Add flag to activate read only mode, fixes #5426.

sfBasicSecurityUser won't accept authenticated users if app_read_only is
activated. This setting accept values from two places: (1) app.yml, and (2)
the environment variable ATOM_READ_ONLY.

The string found in the environment variable is filtered as follows:
- TRUE if its value is "1", "true", "on" and "yes".
- FALSE otherwise.
Generate slugs task: generate for physical object

Similar to the issue in #5263.