Blag update, part 2: Theme warrior, labels, guides

Wasn't actually planning to keep going, but it seemed like the right thing to do.

• All unecessary objects have been removed from the template.
• Blog list has been trimmed aggressively.
• Labels for all posts are now correct and consistent. All useless labels have been removed. Some of the remaining labels are specific to files which are currently unavailable, however.
• All labels, with descriptions, have been added to the 'Label index' page.
• All still-useful guides have been added to the 'Guide index' page.
• Added favicon. Didn't turn out like I'd hoped, and I am undecided as to whether I should use the default blogger icon. This will probably be revised repeatedly.