Initial Commit -- Exact duplicate of MTreeMap
Added a HashMap field named "globalMap" to the MTreeMap class, removed the entryCount field (will now rely on the globalMap to provide this counting facility)
Added SphereAssignment
Updated MTreeMap.put
 MTreeMap.containsKey(K key) now "passes through" to the globalMap, the "contains" methods in Sphere class have been removed
MTreeMap.get(K key) now "passes through" to the globalMap, the "get" methods in Sphere class have been removed
MTreeMap.getClosest(K key) now looks in the globalMap before searching using the distance metric
Minor changes to Query due to renaming MTreeMap --> FastMetricTree
Added "updateValue(V newValue)" to SphereAssignment
Renamed MTreeMap --> FastMetricTree
Renamed MTreeMapDemo --> FastMetricTreeDemo
Updated the lead comment of FastMetricTree