show recent activity on profiles & home

[katelyynn]

store the latest 10(?) (more?) actions the user has done on the site and display on ur profile sidebar, homepage, and in the profiles settings (with an option to opt out - deleting all history instantly)

like old last fm but since we can't see other users activity this is the next best thing

store things like:

• shouts on pages
• gallery uploads
• track loves
• track obsessions
• item bookmarks
• user follows
• profile notes? (bleh)
• playlist creation (low prio)