Merge pull request #4 from VDVsx/master

[nemo-qml-plugin-email] Remove obsolete htmlfield code.
Merge pull request #5 from VDVsx/master

[nemo-qml-plugin-email] Use qmake5_install
Merge pull request #6 from VDVsx/master

Don't create QMailMessageMetaData when is not needed.
[nemo-qml-plugin-email] API cleaning - emailaccountlistmodel, emailagent
Merge pull request #8 from VDVsx/cleaning

API cleaning - emailaccountlistmodel, emailagent
[nemo-qml-plugin-email] Start messageserver5 for Qt5 version.