more help when nant.dir not set, read file for properties.xml from, and changed default to test from build.
more help when nant.dir not set, read file for properties.xml from, and changed default to test from build.

rmboggs/nantcontrib,dahmage/nantcontrib,cgourlay/nantcontrib,nant/nantcontrib,rmboggs/nantcontrib,nant/nantcontrib,cgourlay/nantcontrib,nant/nantcontrib,dahmage/nantcontrib,rmboggs/nantcontrib,cgourlay/nantcontrib,dahmage/nantcontrib