l10n_update 6.x-1.0-alpha3

Changes since DRUPAL-6--1-0-ALPHA2:

• Rollback from HEAD (#897362): Fixed various user texts.
• Updated Hungarian translation
• #919156 by EugenMayer: Fixed Available updates not recognized.
• #916894 by Sutharsan: Fixed Unable to download previously enabled languages.
• #917036 by thePanz, Sutharsan: Fixed Store downloaded files do not validate path
• #947262 by thePanz: Fixed Translation settings menu isn't displayed
• #975952 by Sutharsan: Various documentation and code style fixes.
• #857442 by Thomas_Zahreddin, Sutharsan: Duplicate column name 'status' at install
• #971462 by Sutharsan: Fixed Undefined variable: status in l10n_update_source_history().
• #972100 by Sutharsan: Fixed Wrong parameters in unused batch functions and other minor fixes.
• #972070 by Sutharsan: Fixed Module will not work in php 4
• #980516 by beltofte: Fixed Parse error in l10n_update.api.php
• #992622 by myself: update l10n_update for l10n_client changes
• #983226 by Sutharsan: delete variables on uninstall
• #937298 by grootte, Sutharsan, -redShadow-, myself: check if the database prefix is string for simpletest compatibility