Tested Marsaglia's Xorshift PRNG for 128bit frequency.
Fixed xor128() to behave as same as the C language's implementation.
Fixed comments
Experimented with very basic embedded SVG drawing.
Initial commit that imports svg.js submodule.
Added basic usage of svg.js
Added Graph network drawing to svg.html using svg.js.

We made shared JavaScript source files for the classes and the random
number generator routines.  The htmls' outputs now look almost the same.