Added the intro cutoff point to placeholder content

Signed-off-by: Byron Sanchez <byron@hackbytes.com>
Added page template file for standalone pages

Signed-off-by: Byron Sanchez <byron@hackbytes.com>
Added tag pages template

Signed-off-by: Byron Sanchez <byron@hackbytes.com>
Added placeholder about page

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