Adds `composer.json`.
Merge pull request #3 from simonwheatley/feature/composer-json

Adds `composer.json`.
Update composer.json
1.5-beta1
1.5
Merge branch '1.5'
Update composer.json
Remove type hinting from the `meta_boxes()` method to account for the fact that the `add_meta_boxes` action can be fired on non-post screens
Create LICENSE
Merge branch 'master' of github.com:johnbillion/ExtendedTaxos