Test on default TreeItemController.toString() behavior
TreeItemController should not have empty data
Test: message is taken from data
Refactoring: beautify HTTPAccount.toString()

Add some tests on toString() method. Remove duplication in url
retrieving.
Comment exists in HTTPAccount.toString
First test on SSHAccount.toString
Add working test on comment
Comment is included into SSHAccount description

Close #34
Release version 0.9.13