spam 5.x-1.1

Features:

• page displaying all blocked IP addresses (admin/logs/spam/blockedips), thanks to coofercat
• _uninstall hook (in progress, only cleans spam tables, not spam variables), thanks to nancyw
• improve administrative pages organization, thanks to nancyw

Bug fixes:

• when admin marks content as spam, don't blacklist admin's IP address
• dont redirect users to invalid URL when they report spam
• properly purge reported spam once content is dealt with
• temporarily switch to privileged user when cron needs to delete nodes
• fix PostgreSQL schema definition
• many more