WIP for #138. Adds basic profit calculation as a Block class method.
Fixes bug causing block stats tab to sometimes be 'undefined' instead of an algo
WIP on profitability. Adds basic scheduler task for storing cached profit stats for currencies + chains in redis
Add 'merged' to currency object.
Don't include hashrate of merged currencies in the btc/mh/day calculation
Updates profitability calculation to use merge mined mhashes, but only if no mainnet blocks have been solved in the time window
Adds profitability info to configuration guide
If cached data isn't found, send '???' instead
Rework finished, untested
Abstract aggregation of cached chain profit data
Update translations
A few fixes
Factor in multiple merged currencies
Add some caching to make load faster
Increase timespan for averaging
Adjust frontend a touch
oops