ds 7.x-2.0-beta3

Changes since 7.x-2.0-beta2:

• Fix drag and drop
• Revert #1719578
• #1741352 by llribas: Fixed DS fields not working in Views Displays .
• #1698936 by swentel: Fixed undefined wrapper variable error when no field present in wrapper.
• #1719578 by agentrickard | erald: Fixed DS ignores hook_custom_theme().
• #1748424 by icosa: Fixed view-mode-full class appears twice when used with Zen theme.
• #875802 by pfrenssen | rhumba: Added 'Submitted by' line in Display Suite.
• #1741136 by zkday: Fixed Missing button 'Save field settings' after used ds_forms() module.
• #1744976 by yannickoo: Use format_plural() instead of t function for counting results.
• #1752332 by andrewmacpherson: Fixed Error in documentation comments.
• #1744364 by yannickoo: Replace the underscores in the 'Select an existing layout to clone' with spaces.
• #1739796 by pfrenssen: Fixed Array to string conversion notice when running tests on PHP 5.4.
• #1733378 by netsensei | Glenn_Jones: Fixed Not able to set the dynamic field settings.
• #1744496 by yannickoo: Missing star in the documentation block for ds_build_shared_page_variables() function.
• #1738160 by swentel: Format settings are not available when no ds layout is created.
• #1738160 by netsensei | Tino: Fixed Format settings are not available when no ds layout is created.
• #1519916 by swentel: follow up.