Fix usage of :omerocmd:.
Explain Windows ln_rm limitations.
Redact Windows limitations.
Implement Mark's requirements.
Remove the need for JAVA_OPTS on Windows.
Add switch-group info to user CLI page
Add omero fs section to sysadmin docs.
Add omero fs section to user docs and link to sysadmin.
Fixes and typos following review.
Merge pull request #913 from sbesson/rebased/develop/cli_switch_group

Add switch-group info to user CLI page (rebased onto develop)
Merge pull request #883 from bpindelski/rebased/develop/lnrm-windows

Document client requirements for in-place import on Windows. (rebased onto develop)