merged PCA in with CCA into pca_cca.go
added the helper svdFactorizeCentered,
added Boston and Car datasets for use in tests and examples.
Comment Improvements
go fmt
More Improvements.
made BostonData bostonData
by moving it to stat_test, moved cca_test.go into stat_test as well to
accomodate this.
Merged pca and cca
into pca_cca.go
Minor fixes
Capitalisation mostly
Full Stop
CC type
also adjusted some of the calculations to require less allocation
Updated Tests
also moved around some scaling of columns,
and updated comments
left, right
and some shuffling
Mostly doc fixes
Improvements to documentation
tidied comments, and removed approxEqual
in exchange for floats.EqualApprox.
More documentation improvement
also american spelling of centre
second pass
go fmt
CCA description
View -> Slice
and PrincipalComponents doc correction.
