Add some detail to the Floor Plan documentation to show the correct URL to use for Browser and Android App to prevent blank images on the Android app related to non relative URL
Signed-off-by: Mark van Gelder <vangelder.mark@gmail.com>
Add several pages related to UI.
Move sitemaps, HABPanel to it.
Rename "User Interfaces & Ecosystem" to "Ecosystem".
Rename "Beginner Tutorial" to "Getting Started".
Put the installation guide above the Concepts section.
Also fix https://github.com/openhab/website/issues/270.
Signed-off-by: Yannick Schaus <github@schaus.net>