Added pretty argument.
Added pretty argument.

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