Adding the split-operator chapter and code#108

Merged

leios merged 10 commits intomasterfrom

May 19, 2018

Commits on May 5, 2018

adding smallscale changes.
leios
committed

Commits on May 6, 2018

Commits on May 12, 2018

Commits on May 14, 2018

fixing typo in split-op method.
leios
committed

Commits on May 15, 2018

turning the splitop param module into a struct
leios
committed

Commits on May 18, 2018

adding smallscale changes to spacing in split_op.jl
leios
committed