improve speed and rendering

[vikbez]

• see https://github.com/nwjs/nw.js/wiki/Troubleshooting
• check for possibility to implement pepper flash in the build see #15
• improve execution time (slow on windows at least)

[vikbez]

for execution time: on windows wait for https://github.com/mllrsohn/node-webkit-builder/pull/200 on mac set macZip = true (or false ?)

[vikbez]

fixed with atom electron