Calculation for mode of a tensor
Updated Tensor Mode calculation for n-dimensional array
Cleaned up tests and typos
Doc reference fixes
RF: Rewrite of the tensor mode calculation with no loops.

Also, broke it down into separate functions, added some testing, etc.
Merge pull request #1 from arokem/swederik-enh/TensorMode

RF: Rewrite of the tensor mode calculation with no loops.
Latex squiggle on A for Tensor Mode docs
DOCS + PEP8
Merge pull request #2 from arokem/swederik-enh/TensorMode

DOCS + PEP8
RF: got the terms mixed up a bit.
Merge pull request #3 from arokem/swederik-enh/TensorMode

RF: got the terms mixed up a bit.