achievements 7.x-1.3

Achievements 7.x-1.3, 2011-09-29
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 * The following hooks have been added. See achievements.api.php for details:
  * hook_achievements_info_alter() - modify the achievement information.
  * hook_achievements_unlocked() - respond to achievement unlocks.
  * hook_achievements_locked() - respond to a user losing an achievement.
 * Relative leaderboards have been added.
  * The block and global leaderboard can now show user-specific stats.
  * The current user's ranking can be displayed, along with "nearby" users.
  * "Nearby" users are a number of ranks before and after the current user.
  * The number of nearby ranks shown can be 0 through 10.
  * The block and global leaderboard can be configured separately.
 * The global leaderboard now shows a user's latest achievement.
 * New leaderboard CSS class added: achievements-leaderboard-current-user.
 * The global leaderboard is now a paged view instead of a set limit.
  * Control number of ranks per page at admin/config/people/achievements/.
 * achievements_totals() no longer exists; moved inline to leaderboard page.
 * achievements_totals_user() has been rewritten with different parameters.
 * We now load all of a user's unlocks in achievements_unlocked_already().
  * This is then cached for all future lookups during that page load.
  * a_u_a and a_u can be called a lot per page for heavy achievement sites.
  * Loading all and caching is better, performance-wise, then lots of singles.
 * The database tables have been tweaked to support latest-unlock lookups.
 * Issue #1274350 by makononov: added query tags for the leaderboards.
 * Fixed some warnings that appeared in a first-time installation.