[qmldir] Add Module Identifier Directive
Merge pull request #3 from thp/module-identifier-directive

[qmldir] Add Module Identifier Directive
[configuration] Add sync() method
Merge pull request #5 from blammit/sync-method

[configuration] Add sync() method
[nemo-qml-plugin-configuration] Add a ConfigurationGroup type.

This provides a convenient API for getting and setting multiple
properties under a common key path.