add some fields to API for displaying more info to miners

this patch adds some fields to local_stats and global_stats web API to
display more detailed infos to miners, especially on p2pool nodes with
more than one miner address attached.

global_stats.network_hashrate: total hashrate of coin network
global_stats.network_block_difficulty: latest block diff in coin network

local_stats.miner_last_difficulties: array of address and share difficulty
                    pairs, which lists the actual difficulty of the latest
                    share dished out to each active miner
Merge pull request #7 from mmouse-/minerstats

add some fields to API for displaying more info to miners
Update networks.py

Fixed magic for cachecoin
Merge pull request #9 from Sykh/patch-1

Fixed magic for cachecoin
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
added missing subsidy for cachecoin
need this for windows compile.

for windows compile
Merge pull request #12 from zaw9c1/master

Added vtc module to setup.py, fixes #12
Sets a minimum pseudoshare target to avoid diff 0 HW errors, and sets the targets based on address speed not local node total speed
Merge pull request #13 from roy7/diff1minwork

pseudoshare target diff and address speed fixes
add gpucoin to network settings

Disclaimer: settings taken from https://github.com/TheoRettisch/p2pool-gpuc
Merge pull request #14 from mmouse-/gpucoin

add gpucoin to network settings
add execoin to network settings

Disclaimer: settings taken from https://github.com/paniczklos/p2pool-exe
deleted obviously defunct node seeds
Merge pull request #15 from mmouse-/execoin

add execoin to network settings
Removed testnets and cachecoin...
Removed testnets and cachecoin...
Update README.md
Added tenfive coin
Merge pull request #16 from holodnak/master

Added tenfive coin