RAC dependent calls

gistfile1.m

	RACSignal *signal = [[[[[SomeClient clientForAccount:account] enqueueHTTPRequestWithMethod:@"GET" path:path parameters:nil]
	flattenMap:^(id responseObject) {
		NSMutableArray *signals = [NSMutableArray array];

		[signals addObject:[SomeClient fetchEditmetaForItems:[NSSet setWithObject:item] account:account]];

		[signals addObject:[SomeClient fetchTransitionsForItem:item]];

		return [signals.rac_sequence.signal flatten:1];
	}]
	then:^{
		return [SomeClient resolveAllIssueLinksForItem:item];
	}]
	then:^{
		return [SomeClient updateTimeLogsForItem:item];
	}];