Add end-to-end reconstruction tests

Adjust gamma for centered kPCA (accounting for feature space mean)

Update kPCA_PreImage.m

Install octave-statistics

refactor: improve theoretical accuracy, efficiency, and robustness

Remove emojis from titles as Github does not support them

Multiple improvements

Add table of contents

Better docstring format

Skip demo2, and update README.md

Try to fix octave

Add unit tests and octave workflow

add badge

Add badges and citations

Add picture.