[mlite] Avoid include guard conflict with mlite-global.h

Pointed out here
https://together.jolla.com/question/30505/mlite5-mlite-globalh-has-wrong-define-on-top/
Merge pull request #11 from martyone/patch-1

[mlite] Avoid include guard conflict with mlite-global.h
[mlite] Avoid include guard conflict with mlite-global.h

Pointed out here
https://together.jolla.com/question/30505/mlite5-mlite-globalh-has-wrong-define-on-top/
[mlite] Add an MDConfGroup class.

MDConfGroup represents a directory in the heirarchy of DConf
properties. Values within that group can be read and  written using the
value() and setValue() functions.  Or QObject properties of a derived
type can be bound to keys corresponding to the property name and
automatically kept in sync.
[packaging] Add Qt5Gui to build requirements

It's needed by ut_mdconfgroup
Merge pull request #13 from foolab/master

[dconf] port to dconf
Merge pull request #12 from adenexter/mdconfgroup

[mlite] Add an MDConfGroup class.
Merge pull request #14 from foolab/dconf

[packaging] Add Qt5Gui to build requirements
[dconf] fixed MGConfItem::listDirs()