PA5： Init (Finished MoveToFront CircularSuffixArray)
PA5: Correct BurrowsWheeler (out of time)

using insert sort in CircularSuffixArray
PA5: Passed (3-way quicksort circular suffixarray)
PA7: Init (Dimensionality Reduction)
PA7: Finished (PCA)
Merge remote-tracking branch 'origin/Algorithms'
Merge remote-tracking branch 'origin/MachineLearning'