[client][managed][offline] Removed PullAsync overloads that do not take queryKey
Merge pull request #503 from hasankhan/removeoverload

[client][managed][offline] Removed PullAsync overloads that do not take queryId
Update CHANGELOG.md
Add doccomments to PullAsync overloads
Merge pull request #506 from lindydonna/dev

Add doccomments to PullAsync overloads
Merge branch 'dev' into offline
Merge branch 'offline' of https://github.com/Azure/azure-mobile-services into offline