Temporary code to switch users in orgs for Spring '14
Add method to retrieve array of accounts that match an org ID
Remove the first-object logic.
This leaves simply the aggregation into array methods that are useful and the consumer of the MobileSDK can then interact with the data however it prefers.

Conflicts:
	shared/SalesforceSDKCore/SalesforceSDKCore/Classes/Security/SFUserAccountManager.m
Splitting properties from identity data
Making some properties copy instead of readonly.