Documentation: Updated installation description.
Documentation: Updated installation description.

2bt/racr,otherwiseopen/racr,otherwiseopen/racr,2bt/racr,otherwiseopen/racr,2bt/racr,christoff-buerger/racr,2bt/racr,2bt/racr,otherwiseopen/racr,christoff-buerger/racr,christoff-buerger/racr,2bt/racr,otherwiseopen/racr,otherwiseopen/racr