add new web frontend in /web-static.modern

Provides a new look and some more infos for miners.
For use, please rename the /web-static.modern dir to /web-static

See /web-static.modern/README.md for more info.

See https://github.com/johndoe75/p2pool-node-status for the original version
of this script.
Merge pull request #10 from mmouse-/webfrontend

add new web frontend in /web-static.modern, fixes #8