[dbus] universal tuple marshalling

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[dbus] ServiceWatch - save from CTS

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[ns] setProperties() also with std::map

std::map can be initialized using std::initializer_list
Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[upower] ChargePercentage is rounded

And property Capacity is double

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
no more mangling changes notes during compilation

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[connman] initial version

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>