v1.2.0

final fixes before graduation

v1.1.0

moved MapReduce chapter to appendix

v1.0.0

Completed first version

v0.8.2

applied some corrections

v0.8.1

written acknowledgements and minor changes

v0.8.0

written ch 8

v0.7.0

Written ch 7

v0.6.2

Applied ch6 corrections

v0.6.1

Highlight terms in ch6 and minor corrections

v0.6.0

Completed ch6