different setup for pydica version
explain watchmount and why it is needed

(maybe watchmedo could grow global options, but that may others work out)
bump version to 0.6.2
refine the DOAP record.

The support for virtual servers is crucial for us.
bump version to 0.6.2
refine the DOAP record.

The support for virtual servers is crucial for us.
parameterize index.rst more
  parameterize index.rst more
settings for pydica version
document the MountObserver
document the MountObserver