Metacat

add anchor for plugin handlers property

add documentation entries for fields that appear on the main metacat admin page.

correct the metacat.properties help anchors.

marked the properties that are only editable manually in metacat.properties
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5516

format xml/eml table -- added missing row delimiter
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5516

Moving Metacat Sphinx RST documentation from docs/dev to docs/user directory.

Converted the metacat-properties chapter to RST format. Still need to merge in
newer changes from the trunk, as I was accidentally working from the 1.9.4
branch for this whole conversion process.

Updating Sphinx doc structure in prep for moving metacat admin guide to Sphinx.

Begin process of migrating Admin guide to Sphinx. Structure is now set up, but
content needs to be copied.