Fixes #1379
Merge branch 'integration' of git://github.com/symphonycms/symphony-2 into integration
When saving with current data throws error at line 237 - Illegal string offset 'error'. Fixed by checking that the value is set first.
Merge pull request #1383 from designermonkey/integration

Integration
Merge pull request #1391 from jmoont/master

Fixed upload field error when using PHP 5.4.4
Return empty XMLSet when no author is found
Add Author/Developer visibility to the Author field. Fixes #1219
Extend the DatasourcePostEdit and EventPostEdit delegates to also pass the previous filename in the case where the DS/Event has been renamed. Closes #1349
Merge pull request #1395 from klaftertief/autors-ds

Prevent Authors DS from spamming the Symphony log.
Display the Select box help hint inline, fixes display issues on smaller resolutions. Closes #1344
If an Extension's install method fails, call the uninstall method to clean up. RE: #1326
Update several strings for more consistent and descriptive wording in the backend. Closes #1331
Backend wording, RE: #1331
Initial work on exportable fields.
Alternate codepath for PHP5.2 with Data source providers to prevent errors in PHP5.4. Fixes #1389
Add modification date to Entries. The creation date and modification date are now both exposed in Datasources for parameter output, filtering, sorting and output. The General::createXMLDateObject now also outputs an iso attribute with the full timestamp. Closes #983
Add offset attribute to General::createXMLDateObject
Cleanup of moving section order to the file system, closes #977
Make the Entry object consistent in the Publish context
Automatically rename files when a clash is detected in the Upload field. Closes #672