[nemo-qml-plugin-email] Some more QVariants changed to basic types
Merge pull request #22 from kananoja/master

[nemo-qml-plugin-email] Some more QVariants changed to basic types
Merge pull request #21 from VDVsx/master

Fix bug in isAccountValid() and isMessageValid()
[nemo-qml-plugin-email] Register EmailFolder as a qml type
Merge pull request #23 from kananoja/master

[nemo-qml-plugin-email] Register EmailFolder as a qml type
[nemo-qml-plugin] Add signature role to accountsListModel.

Remove unrelated function getMessageBodyFromFile().