initial commit
Switch from MIT to 3-clause BSD license

To simplify matters, use the same license as the Sailfish Silica QML code.
Also note the license in README.
Harmonize the slider with the Silica components

TODO: show the value
Remove the built-in margin

To be consistent with the Controls combobox,
it is also much easier to add a margin later than to remove it.
Add a built-in label to the Controls combobox

This makes it consistent with the Silica combobox and looks nicer. :)
Remove local copy of Universal Components

They will be replaced by a git subtree for easier maintenance.
Add 'modules/gui_modules/gui_qt5/qml/universal_components/' from commit '1a90ca14659063eeb99925cc78ccb0f77dee101a'

git-subtree-dir: modules/gui_modules/gui_qt5/qml/universal_components
git-subtree-mainline: 5cd790b41889411e1aae5d4c8f7a3f9c4abe5519
git-subtree-split: 1a90ca14659063eeb99925cc78ccb0f77dee101a