Siamining Stats page can be better

[yannisr]

Hello,

the page at https://siamining.com/stats, could be more user friendly.

1. The colors of the charts are very confusing. You could use red for difficulty and dark blue for price n USD.
2. The chart could be more flexible and show more than just 7 days data.
3. You could add a graph with the mining payout: SC/day per GH/s

Thank you