Make it convenient wrapper around qrexec-client{-vm}, which would start a VM, wait for user session etc.
QubesOS/qubes-issues#853
Most of them are moved from core-admin repository, even if tool is not implemented yet. Some are generated using skel-manpage.py script. This way we have complete man pages list, and sphinx will properly warn/error about inconsistencies.
Some parts (especially in qubesmgmt/dochelpers.py) copied from core-admin repo.
