Set author field by config author name
Set author field by config author name

I can't seem to find the reason of having author field filled with
description.

Signed-off-by: Rohan Jain <f3a935f2cb7c3d75d1446a19169b923809d6e623@gmail.com>

freizl/freizl.github.com-old,d12frosted/hakyll,freizl/freizl.github.com-old,Minoru/hakyll,Javran/hakyll,freizl/freizl.github.com-old,freizl/freizl.github.com-old,freizl/freizl.github.com-old,freizl/freizl.github.com-old,oldmanmike/hakyll,freizl/freizl.github.com-old,beni55/hakyll