Added index template file

Signed-off-by: Byron Sanchez <byron@hackbytes.com>
Added archives template file and page

Signed-off-by: Byron Sanchez <byron@hackbytes.com>
Updated author mixin.

It will now return the author defined in config.json if the current page
doesn't have one defined.

Signed-off-by: Byron Sanchez <byron@hackbytes.com>