Merge pull request #5 from slash7/master

Linkedin example
Fix readme.md
added app delegate function to readme
Merge pull request #7 from dinodsaurus/master

added app delegate function to readme
Added PUT, DELETE Method
Merge branch 'master' of github.com:dongri/OAuthSwift
Add dropbox example
Update README.md
Update README.md
Fix oauth problem when user denies access.