Shai Demri issues

Results 6 issues of


                                            Shai Demri

add missing content to section 4.8

Translat section 5.13 to Hebrew in README.hebrew.md

Translate section 5.12 to Hebrew in README.hebrew.md

Fix some typos and improve translation to be closer to the english source

The function name `kRing` is the name of a V3 function. I simply updated the documentation to the V4 name. `gridDisk`