Add tutorial to train parity using MNIST#56

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lxn2 wants to merge 7 commits intodmlc:masterfrom

Commits on Mar 10, 2017

Added 'Even/Odd' example
Andrea Olgiati
committed

Commits on Mar 23, 2017

Clean up & commentary
Nguyen
committed
Merge branch 'master' of https://github.com/lxn2/mxnet-notebooks
Nguyen
committed
Move notebook into folder
Nguyen
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Revert "Move notebook into folder"
Nguyen
committed

Commits on Mar 24, 2017

Improve preable & annotations
Nguyen
committed
Couple more clarifications
Nguyen
committed