Add README for styling profiles
Add README for styling profiles

RevBy: TrustMe
The README is very basic, but at least describes the directory layout of a
styling profile.

develersrl/maliit-demo-qml,maliit/plugins,maliit/plugins,develersrl/maliit-demo-qml,KDE/plasma-maliit-plugins,KDE/plasma-maliit-plugins,RHawkeyed/plugins,KDE/plasma-maliit-plugins,develersrl/maliit-demo-qml,KDE/plasma-maliit-plugins,RHawkeyed/plugins,develersrl/maliit-demo-qml,RHawkeyed/plugins,maliit/plugins,RHawkeyed/plugins,RHawkeyed/plugins,maliit/plugins