coda.base 0.1.7 (Release date: 2017-08-25)
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* Problem with function composition using 'clr' basis solved.
* 'coda.base.basis' option included to hide the basis when printing the coordinates.
* New method which uses the principal components included in pb_basis.
* Documentaion improved.

coda.base 0.1.8 (Release date: 2017-12-03)
===============
* Exact algorithm for Principal Balances included.
* Bug in lsearch base in principal components solved.
