enable plantuml generation when building the sphinx documentation. note that you do need to have graphviz installed, but hopefully that is all.
Modifications to make the build more readily find locally installed versions ofsphinx-build, and to remove the unneccary 'html' directory; output ofadmindoc is now written directly into build/docs.
Added links to Javadoc. Tuned the layout a bit.
Moving Metacat Sphinx RST documentation from docs/dev to docs/user directory.
Adding new documentation section for Metacat design documents in Sphinx/ReStructured Text format. Build this documentation using theprovided Makefile, assuming that both Sphinx and PlantUML are installed and on the local executable path by running 'make plantuml html'....