Update twitter documentation

- to reflect refactoring in zendframework/ZendService_Twitter#11
Added "application" section

- and moved "rateLimitStatus" below the "application" section
Merge branch 'hotfix/twitter-docs' of github.com:weierophinney/zf2-documentation into weierophinney-hotfix/twitter-docs
Merge branch 'weierophinney-hotfix/twitter-docs'
Close #718