CRAN v0.2.0

New features:

• function predict() projects new data onto a layout defined by an object created via umap(). Works for method="naive" and method="umap-learn"

Updates:

• performance imprevements for default implementation of umap with method="naive"
• interface to python implementation moves from method="python" to method="umap-learn"
• interface to python implementation is consistent with umap-learn versions 0.2.x and 0.3.0