Merge pull request #16 from VDVsx/master

Detect draft folder properly.
[nemo-qml-plugin-email] Add messageIdToInt to EmailAgent
Merge pull request #17 from kananoja/master

[nemo-qml-plugin-email] Add messageIdToInt to EmailAgent
[nemo-qml-plugin-email] Replacing QVariants with basic types for better QML compatibility
Merge pull request #18 from kananoja/master

[nemo-qml-plugin-email] Replacing QVariants with basic types for better QML compatibility
Merge pull request #19 from VDVsx/master

[nemo-qml-plugin-email] Add emailfolder.
[nemo-qml-plugin-email] EmailMessage::setRead added
Merge pull request #20 from kananoja/master

[nemo-qml-plugin-email] EmailMessage::setRead added
[nemo-qml-plugin-email] Fix bug in isAccountValid() and isMessageValid()

Check if account and message actually exist in the DB.