documentation is updated

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
separated engine initialization from application

it is allowing to reuse engine initialization, intended for qml apps invokers

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
rpm spec

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