[PIO-153] Allow use of GNU tar on non-GNU systems
[PIO-153] Allow use of GNU tar on non-GNU systems

Closes #469

PredictionIO/PredictionIO,takezoe/incubator-predictionio,shimamoto/incubator-predictionio,shimamoto/incubator-predictionio,marevol/incubator-predictionio,marevol/incubator-predictionio,takezoe/incubator-predictionio,shimamoto/incubator-predictionio,PredictionIO/PredictionIO,PredictionIO/PredictionIO,marevol/incubator-predictionio,takezoe/incubator-predictionio,marevol/incubator-predictionio,shimamoto/incubator-predictionio,takezoe/incubator-predictionio