[iOS] Fix script build

Put BuildVersion back to 0 so build can set it to YMMDD of build instead
[iOS/features] Initial check-in for features header and APIs
[iOS/features] Features for table APIs
[managed][client][offline] PullAsync should operate according to supported options
[client][managed] merge refactoring changes from offline to dev
[client][managed][offline] updated nuget packages to latest version
[client][managed][offline][test] added support for running offline tests against .net backend
Merge pull request #354 from hasankhan/utilitydev

[client][managed] merge refactoring changes from offline to dev
Merge branch 'dev' into offline

Conflicts:
	sdk/Managed/src/Microsoft.WindowsAzure.MobileServices/Http/HttpUtility.cs
	sdk/Managed/src/Microsoft.WindowsAzure.MobileServices/Table/Query/Linq/MobileServiceTableQueryProvider.cs
	sdk/Managed/src/Microsoft.WindowsAzure.MobileServices/Table/Query/Linq/MobileServiceTableQueryTranslator.cs
	sdk/Managed/src/Microsoft.WindowsAzure.MobileServices/Table/Query/MobileServiceTableQueryDescription.cs
	sdk/Managed/src/Microsoft.WindowsAzure.MobileServices/Table/Query/ODataOptions.cs
	sdk/Managed/test/Microsoft.WindowsAzure.MobileServices.Test/UnitTests/Table/Query/ZumoQuery.Test.cs
	sdk/iOS/src/WindowsAzureMobileServices.h
[client][managed][offline] do not throw on null fields for operation and error
Update CHANGELOG.md
[iOS/features] Features for offline usage
[iOS/features] Change property to nonatomic
Merge pull request #355 from carlosfigueira/iOSFeatures

iOS SDK features telemetry
[client][managed][offline] Fixed build errors