Dependency fixes

This now gives an error on rake:

(main)> 2013-05-18 14:26:44.197 sqlite3_sample_app[19597:c07] ExecSQL: SELECT 1 FROM sqlite_master WHERE type="table" AND name="todos";
ExecSQLResult: [{"1"=>1}]
Objective-C stub for message `dateWithNaturalLanguageString:locale:' type `@@:@@' not precompiled. Make sure you properly link with the framework or library that defines this message.
*** simulator session ended with error: Error Domain=DTiPhoneSimulatorErrorDomain Code=1 "The simulated application quit." UserInfo=0x100119540 {NSLocalizedDescription=The simulated application quit., DTiPhoneSimulatorUnderlyingErrorCodeKey=-1}
rake aborted!