Added some javadoc and a JUnit test for MetaIterator.
Modified MetaIterator so that it doesn't have to have a non-empty sub-iterator.
Merge branch 'master' of github.com:jacobean/HyPeerWeb

Conflicts:
	HyPeerWeb/db/HyPeerWeb.db
Merge branch 'master' of github.com:jacobean/HyPeerWeb

Conflicts:
	HyPeerWeb/db/HyPeerWeb.db
Minor changes
Merge branch 'master' of github.com:jacobean/HyPeerWeb

Conflicts:
	HyPeerWeb/db/HyPeerWeb.db