Merge pull request #20 from sesuncedu/fix-xmlwriter

Avoid reported problem of duplicate xmnls declarations at start of doc. ...
Copying readers and writers from SolrMarc.  Genericizing container
classes, and removing iterators.
Re-enable ivy in the build.xml file.  Minor changes to eliminate
warnings
Merge branch 'master' of http://haschart@github.com/marc4j/marc4j.git

Conflicts:
	src/org/marc4j/MarcXmlWriter.java
Manually merging in pull request from sesuncedu.
added an xmlwriter
Merge remote-tracking branch 'upstream/master' into fix-xmlwriter