Changes

===== shell sort =====

[[File:ShellS.png]]

[https://www.dropbox.com/s/gzq4hxxuo6w5v46/arraySorting.h?dl=0 sort.h] algorithms file,

[https://www.dropbox.com/s/ifckl4or27yn6qb/main.cpp?dl=0 main.cpp] (v1) file,