Modified .R file: rad() function now calculates the sqrt(r^2+...), so now it is the actual length of a vector, not its square.
Added a huge discription into physics.docx of the physical system, data structure, gradient descend and the first of my R function - init()
removed unnecessary files.
Merge branch 'master' of https://github.com/adensur/Cluster2.0-Lozovik-