Added note about new Node's behavoir.
Added note about new Node's behavoir.

nmrugg/LZMA-JS,zzzhan/LZMA-JS,nmrugg/LZMA-JS,zzzhan/LZMA-JS,addaleax/LZMA-JS,zzzhan/LZMA-JS,addaleax/LZMA-JS,nmrugg/LZMA-JS,addaleax/LZMA-JS