Add tracking for a certain hash

This is a fairly simple hack to record any imgur URLs discovered via the
random image facility that match a certain MD5 hash.

A known bug with this commit is that it may crash the bot the first time
the bot tries to add to the database, as the category is undefined. This
can be easily worked around by ensuring that the category is
prepopulated with at least one image before letting the bot add
automatically.

An issue should probably be opened to merge this code into something
reading hashes from a configuration file: it's pretty hardcoded at the
moment.
Add 5s timer functionality to random imgur

* Add [.] key to enable timer
* "Loading..." message turns red and italic when timer is active
* Press [.] key to disable timer.

After a bit of experimentation, 5s seemed optimal: 2 seconds would cause
the imgur api to trip if the app is used more than once at a time; 5
seconds is enough time to view the image without feeling particularly
slow.

Maximums:
 1 images in 5 seconds
3600 images in 5 minutes
43200 images in an hour
Adding config option to auto-add hashes to qdb

This should be useful for keeping track of certain massively duplicated
images.
Correct accidental Italian accent in admin module
Merge pull request #451 from zuzak/borkborkbork

Add tracking for a certain hash