Results 2 issues of jfitzell

As reported in #83 [this comment](https://github.com/jfitzell/mozilla-keychain/issues/83#issuecomment-241228025), there seem to be some problems updating passwords: Looking up and adding passwords seem to work great but I was running into problems with...

From [Issue 77](https://github.com/jfitzell/mozilla-keychain/issues/77#issuecomment-256183818): > The recently introduced searchLogins method is not aware of guid, and in the absence of any properties it would recognize, it turns the query into a...