bitcache 6.x-1.0-beta1

First beta release for Drupal 6.x.

Changes since 6.x-1.0-alpha3:

• #341654: "Unsupported operand" error on installing Bitcache: Renamed bitcache_link() to bitcache_l() to prevent conflict with hook_link().
• Implemented a 'contents' options for bitcache_delete_repository().
• Refactored unit tests for Simpletest 2.x compatibility.
• #365077: Timeout fetching bitstream from URL Prevent timeouts when manually importing a bitstream from a URL.
• Fixed the recommended installation path in README.txt.
• Added a note about the Bitcache command-line tools to INSTALL.txt.
• Implemented a new setting for configuring the path to the Bitcache command-line tools.
• Renamed the previous 'synchronization' setting to 'cron script'.
• Implemented the new API functions bitcache_sync(), bitcache_exec(), bitcache_yaml(), and bitcache_tmpname().