Debounce post settings events

fixes #1582
backbonejs model conflict with connect-slashes

close #1648
- backbonejs model doesn't include tailing slash by default
- connect-slashes returns 301 for GET without tailing slash
- overwrote backbone model url method to include tailing slash
Merge pull request #1632 from hswolff/issue1582

Debounce post settings events
Merge pull request #1648 from KingKarl85/api-slashes

backbonejs model conflict with connect-slashes