Add basic CSS style and favicon.
Display reward computation result in a table.
Add a table giving the probability of minting a POS block.
A few style improvements.
Fix the formulas for computing POS probability and reward.
Update the text explaining the results.
Add minting probabilities for 31 days, 90 days and 1 year.
Merge pull request #11 from glv2/patch-1

Add basic CSS style and favicon.