DEMO: Add command line options to PCA demo
DEMO: Add command line options to PCA demo

PCA demo (bayespy/demos/demo_pca.py) can be run as
    python demo_pca.py <options>
with several command line arguments, such as dimensionality of the data
or the latent space and whether to use speed-up rotations or not.

bayespy/bayespy,SalemAmeen/bayespy,fivejjs/bayespy,jluttine/bayespy