Small boss

Global:

• [Added] Clicking a tag when tagging shows related tags
• [Added] "upvoted" tab
• [Added] Tweaks to search aliases; added order:fav_date and order:file_size
• [Changed] Hidden posts can be viewed by moderators

Frontend:

• [Changed] Better search syntax help
• [Fixed] User list on Chrome w/ endless pagination
• [Fixed] 404 page appearance
• [Fixed] Registration form appearance
• [Fixed] Keyboard shortcuts in Flash posts (this time looks like it's solved for good)
• [Fixed] Clicking prev/next post on Chrome

Backend:

• [Fixed] Account activation not working
• [Fixed] Password reset not working
• [Fixed] Password changing acting funny with logout/login
• [Fixed] Search - order direction was set to ascending
• [Fixed] Search - exception when parsing certain invalid dates
• [Fixed] Search - exception when searching for score_min: and score_max:
• [Fixed] Automatic post featuring not working
• [Changed] Switched to MarkdownExtra (yay, tables support!)
• [Changed] Refactor to tag autocompletion
• [Changed] Markdown - more readable ATX header handler override
• [Changed] Markdown - better behaviour for spoilers containing links and tag permalinks