Manual queue and lots of maintenance

Frontend:

• [Added] multiple titles to achievements (suggested by our users)
• [Changed] the queue now works by manual enqueuing; request update by clicking the button in profile (#131)
• [Changed] text in first-time enqueue page is now more readable and informative
• [Changed] text in Privacy policy now conforms to Google's requirements
• [Changed] contact information is now more visible in About
• [Fixed] wrong text in some achievement tooltips (#129)

Backend:

• [Added] support for HTTP proxy, in case MAL bans us for the millionth time (which it did)
• [Added] more options to admin panel
• [Changed] export URL changed a bit to allow embedding on MAL
• [Fixed] franchise subprocessor for manga
• [Fixed] multiple errors which arise when the engine can't get meaningful data

There are two things to note with this release:

• Your profile will not update automatically anymore. You need to click the button in the upper right corner of your MALgraph's profile, which will put you in the queue and then request update. Thanks to this change the queue works 100 or even 1000 times faster, so on average you don't have to wait more than five minutes to get new data. Here's how to update your stats:
  
• MAL increased its security layers by disabling showing dynamic images. This pushed us to slightly change the URL to trick MAL into believing the image is static, which in turn means that you need to re-export your rating distribution image if you want to make it work properly. Sorry for the inconvenience.