Metacat

Add code to handle public id and system id.

Implement logout method.

Add a logout method.

Implemented the update and delete methods in the interface, along with tests.

Implemented the "insert()" method and wrote a test to test it. The new test
depends on the property "newdocid" be set to something unique in the build.xml
file so that the insert will work properly. Probably need to fix this to be
some kind of autoincrement counter or random number so that it can be run...

Refactored to use IOUtil routines. Reformatted for within-file consistency.

Implement query method.

Add metacatinaccessible exception for query.

Implemented the 'read' API call. Some more to go...

Wrote the login() function, the first of the series of API calls for
the metacat client to be implemented. Also wrote a test class to
test the API functionality.