Removed libraries that are not needed for SpatialHadoop and comes with HDFLib
Support both Hadoop 1 and Hadoop 2 install with one ant target
Fixed input/output checking depending on whether the output of an operation is mandatory or optional

changed the default block size in tests to 1MB to conform with Hadoop 2.x standards
Fixed a bug with reading the results of a sample
Merge branch 'master' of /project/alexandria08/shadoop-ext
Check in FileMBR if input shape is not set and cannot be detected