Include Genericons

This adds the lovely Genericons from Joen.
Add Genericon symbols for published date and tags
Set tag display in entry-meta to conditional

This ensures that the Genericon and HTML are only output if the post
has at least one tag.
Match Genericon color for tags to the text color

This fixes an issue where it inherited the darker color for
.entry-meta. Consistency in all the things. :)
Adjust alignment of status format text

This fixes an issue where longer status posts that wrapped below the
avatar image would float all the way to the left edge. With the padding
they remain inline with the first line of text.
Add support for quote format

This adds post format support for quotes. See #6.