Metacat

add note about https://redmine.dataone.org/issues/2451 to the documentation

update docs to match node registration behavior: we do not assign them nodeIds at registration

Set mime type on images.

Set mime type.

Use 'a2dissite' to disable the default site (not 'a2ensite').

Updated configuration documentation in admin guide for Metacat DataONE section. Changed links in configuration utility to point at the Admin guide.

edited the configuration docs, swapped in new fully-configured screen shot
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5516

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

some minimal editing on replication configuration -- bulk of it had been done in the Word doc before rst conversion
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=5516