Provide beginner-friendly instructions

[fmoc]

Context: owncloud/docs-client-desktop#242

In order to avoid redundancies and provide up-to-date documentation close to where it is needed, this repository should provide easy-to-use-and-understand user documentation. We need beginner-friendly setup and usage tutorials that allow non-devs to create their own build using ownbuild and craft.

[mmattel]

@fmoc any update on this (as we discussed) ?

[fmoc]

Sorry, have not gotten around to writing the text. It's got a high priority on my TODO list.

[Isabelle-Gross]

If it is still relevant for someone. I managed to get the Debugger running with QT Creator or Visual Studio following these steps:

InstallGuideOwnCloudClientWindows.md