Fixing broken Importer links
Update client logging section

After the removal of tools/OmeroImporter, URLs used
in the logging section were broken (404), though the
text was semantically wrong before that.

Updated to describe CLI and Insight logging, though
some more explanation may be useful.
Use "OMERO.insight" rather than "Insight"
Merge pull request #197 from joshmoore/fs-docs-fix

Fix logging docs for develop/FS work