changes to allow child theme more flexibility

Hi,
I added changes to allow child theme to overwrite reverie_entry_meta and css/sass import. The css/sass is useful because I had to write a bash script to parse and change that line in the parent theme when doing an automated deployment. Moving this to the child should make updates easier as that wouldn't need to be changed on every update. Same goes for the reverie_entry_meta. It just makes things easier with updates.

Thanks,
Dan