demo 5.x-1.5

Changes since DRUPAL-5--1-4:

• #265801 by smk-ka: Added exclusion of data in cache tables for snapshots.
• #268056 by sun: Fixed incomplete snapshots due to max_execution_time reached.
• #272526 by smk-ka: Added file size to snapshot list.
• #269561 by smk-ka: Performance: Disable indices to speed up import.
• #272820 by sun: Increased maxlength for snapshot file names.
• #286781 by alex_b: Added function return value for demo_reset().
• #312215 by rondp: Added foreign key support.
• #294879 by smk-ka: Moved admin functions into include file.
• #329182 by sun: Moved menu items below admin/build.
• #369642 by smk-ka: Added checkbox to define new snapshot as default.
• #369711 by smk-ka: Added confirmation before deleting a snapshot.
• by smk-ka: Fixed a bug in demo_reset() where long lines could be partially crippled, resulting in broken imports. This happened when a chunk of data in the middle of long line started with a comment sign, causing the import function to discard it.
• by smk-ka: Updated translation template.
• by smk-ka: Updated German translation.