To avoid plugin territory warning for CPT and Meta Boxes, This is a great choice for you. Violet Custom Post Meta adds necessary CPT, Meta, Texonomy to develop awesome portfolio theme.
Post Types:
Note that this plugin function can be modify as your choice by filter Hooks.
Hook Lists :
vcpm_{post_type}_params //to modify post type args.
vcpm_portfolio_category_params //to modify portfolio texonomy.
vcpm_meta_fields_{post_type} //provides ability to add, remove, modify meta fields.
vcpm_meta_box //Provides ability to create, delete and modify meta box.
vcpm_meta_fields_control //Fields styte, presentation can be modify.