Upgraded BigIntArrayTest to version 3.1.0 compatibility.
Upgraded BigNestedIntArrayTest to version 3.1.0 compatibility.
Upgraded MutableSparseFloatArrayTest to version 3.1.0 compatibility.
Upgraded SparseFloatArrayTest to version 3.1.0 compatibility.
Ported TermLongListTest.
Implemented the classes in the BoboBrowse.Net.Facets.Attribute namespace and the corresponding tests.
Changed to creating a new stringbuilder object rather than clearing it because there is no Clear method in .NET 3.5.
Fixed BrowseSelection.ToString method to call ToArray() so it will support .NET 3.5.
Updated the BoboIndexReader to use the ClosableThreadLocal class from Lucene.Net because they have an implementation that works in .NET 3.5.
Ported types in the BoboBrowse.Net.Analysis.Section and BoboBrowse.Net.Search.Section namespaces and the associated tests.