Releases for Block API

Updates to module to enable a similar codebase to the Drupal 7 release.

Changes to hooks:

• hook_block_api_info() is now hook_block_api_block_types().
• hook_block_api_view() is now hook_block_api_display().
• hook_block_api_form(), hook_block_api_save(), hook_block_api_delete() all remain the same.

There is also no need to call hook_block() anymore to use Block API as Block API will handle this through hook_block_api_block_types().