Major updates

single-casters.php/single-wheels.php
-Copied from server to most recent update

create-fields.php
-Update some meta names to more relevant names

create-post-types.php
-Remove old CSS icon implementation (outdated since WP 3.8)
-Add dashicon

meta-boxes.php
-Update some meta names from create-fields.php

save-fields.php
-Update some meta names from create-fields.php

cccc.php
-Correctly enqueue files

readme.php
-No real changes