Expansion in search? #200

I'm having some problems expanding resources in search queries. (Trying to expand "groups" in queries on Accounts in an Application)

If I make a request like this:

query = # my query dict
query['expand'] = 'groups'
accounts = stormpath_client.application.accounts.search(query)

or like this:

expansion = Expansion()
expansion.add_property('groups')

q = {Resource.to_camel_case(k): v for k, v in query.items()}
accounts = stormpath_client.application.accounts.search(query)
expanded_accounts = AccountList(stormpath_client, accounts.href, query=q, expand=expansion)

, I do get a response from the server that includes the groups property of every item in the collection expanded. (Note also that search does not accept an expand=Expansion() parameter).

Unfortunately another http request is then issued any time I try to access the groups property in an account in the resulting parsed collection.

accounts[0].groups # this sends an http request even though the groups data was already received

I'm using the latest version (2.0.8) on python 3.4.

I assume I'm either not doing this right, or this is a bug affecting all collections. Wanted to check before working on a patch if the latter. Thanks!