Fix time estimation

[leftmove]

Time estimation has been broken for a while.

It is either too slow or not functional whatsoever. Additonally, the "algorithmn" is a simple divide by two function that gives an incredibly rough "estimation." Since wallstretlocal has gone public, there are now enough statistics in the database to create a reasonable average time required using log counts.

• Make estimation faster
• Using estimated log count from counted stocks, create time estimation based on average taken from statistics collection