added localStorage adapter
style changes
style changes, modal, foundation
added getAuthor function to check for author in localStorage
Q1-Q5 done

Improvements:
Q1
- change prompt to inline alert
- UI confirmation wording
Q2
- messy code
Q4
- inline alert instead of relying on html5 ‘required’
Q5
- comments with ‘author’ already should not be set to localStorage
‘author’