Update assets/field_metakeys.publish.css

Added padding so the inputs sit a little neater in the pair box.
Merge pull request #9 from nathanhornby/patch-1

Adjust padding for a neater style.
Merge remote-tracking branch 'upstream/master'
Sanitiza input values (fixes bug with quotes)
Added collapsable / orderable for the meta keys
Allow assigning values and the use of comma's in your keys/values
Merge pull request #13 from kanduvisla/master

Various fixes:
- Allow Meta Keys to be orderable and sortable
- Allow key's to be assigned a default value
- Sanitize keys