Suffix generation

Ive added this as a separate pull request even though it builds on my previous one as it is more opinionated than your previous script. 

Either way I've kept on using this script and have also added a suffix to the different kinds of identifier

- a segue called "detail" becomes `XXXDetailSegue`
- a view controller identifier called "userScreen" becomes `XXXUserScreenIdentifier`
- a cell with identifier "contactCell" becomes `XXXContactCellReuseIdentifier`